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A Dodrio call sounded next to him, making the husky roll over in bed as one arm flopped around until it found his alarm clock and hit the snooze button. Ari grumbled a bit, cuddling himself up under the covers some more with his eyes still solidly shut until, nine minutes later, the three-tone call played from his alarm clock. He smacked the snooze button again, but this time he yawned and stretched a bit, half-opening his eyes as he stared at the ceiling, slowly waking up in time for the next Dodrio call.

Groggily, the husky rolled the covers off of him and sat up, scritching as his root-beer-colored fur a bit before standing and stretching again. He shuffled over to his dresser, pulling out some Squirtle boxers and a plain white t-shirt to put one before heading downstairs for breakfast.

He was in no rush today because, thankfully, it was the weekend! Two whole days of getting to relax and essentially do nothing! Well, nothing unless you counted the odd chores here and there or going out for some fun. Right now, though, all Ari was focused on was getting some breakfast.

The husky scratched his belly under the shirt as he made his way down the hall, out into the main open area of the house and down the stairs, crossing the den into the kitchen portion. He went straight for the refrigerator, blearily looking around inside before taking out the carton of orange juice and a big bowl of chilled waffle batter his father had mixed up for them earlier that week. He poured himself some juice before scooping out a healthy portion of the waffle mix into the waffle iron on the counter.

As his waffle cooked, he returned the bowl to the fridge before pulling out a can of whipped cream and a box of strawberries. He also opened the pantry, but huffed when he realized they were out of syrup. He frustratedly took a gulp of his orange juice before sitting down at the kitchen's island table, idly munching on strawberries as he waited for his waffle to cook.

The iron's buzzer went off, and he got up to get his fresh, homemade waffle. As he stood, though, he noticed a note left on the side of the island. It was clearly his father's handwriting, so he picked it up to read.

"Morning Ari!

"As you probably could tell last night, I've been making rapid headway on my latest project. I think I'm really close here. Also rather tired by now. Could you come down to the lab once you've had breakfast? I could probably use your assistance by then.

"Dad

"PS - bring me a cream soda from the fridge when you come down!"

The young husky smiled and shook his head a bit as he finished reading and got his waffle out. His father, professor Kade Maple, was one of the leading researchers in the area, his house and lab part of a large Pokemon complex just outside of town. Ari was often a guinea pig in his father's projects. Things occasionally got a little crazy, but generally Kade was very good at his job.

Ari hummed to himself as he had his strawberry shortcake waffle breakfast, finally finishing up and cleaning up before jogging back up to his room to put some gym shorts on over his boxers. He then made his way over to the lab wing of the house. (He remembered to grab that cream soda from the fridge first, of course.) The young canine didn't see his father in the ground-level section of the lab that opened to the indoor/outdoor Pokemon complex, so Ari surmised his father was doing more technical stuff in the lab's lower level.

The basement section of the lab looked like a high-tech chemical or medical experiment zone, all kinds of gadgets on the lab benches around the walls, one corner with an oven and the opposite with a freezer, and a well-equipped table in the middle covered with all sorts of science paraphernalia and at least two laptops. His father was working at a side bench, lab coat resting nicely over his strong frame.

"Morning, dad!" Ari piped up as he got down the stairs.

The large, cream-colored husky turned and smiled. "Ah, Ari! Good morning! And you brought my soda!" Even before the larger canine removed his safety goggles, Ari could see the dark circles under his father's eyes. It was clear he had been up all night working; at least he still seemed bright and energetic, excited at the progress he had been making.

He took the offered bottle of cream soda and popped off the cap, lifting the bottle to his lips and beginning to drink deeply. Ari blushed a little, watching and listening as his father chugged the entire bottle down without letting it leave his mouth, only giving a deeply satisfied "aaaahhh" when there wasn't a drop left.

"I haven't had anything to drink since dinner last night," the older husky explained as he wiped his mouth.

"I can tell!" Air replied, pulling up a chair next to the center table. "So what were you wanting me to do? Siphon samples into test tubes? Run the centrifuge while you separate things?"

"Actually, all of the mixing and biochemisty is all done! I think." Kade heaved a sigh and leaned up against the workbench, reaching over and pulling over a large beaker filled with a faintly-orange liquid, a smaller capped beaker with a cream-colored liquid, and a few empty vials. "I was hoping to start testing this serum, you see..."

Ari grimaced slightly. He didn't mind being his father's test subject whenever he invented a new physical product to test out, even if the chances of something malfunctioning and hurting was higher with those than the his father's wetter, biology-based experiments, but all those potions and what else not usually made the younger canine feel funny afterward, whether the experiment was a success or not. "Last time you made me drink something, I was burping constantly for four days..."

Kade chuckled and patted his son on the shoulder. "Don't worry, boy! This serum is designed as an injectible, like a vaccine, so it won't make your belly all bubbly! (Avoids the weird taste, too.)"

The younger canine hrrmmed and squirmed a little bit. "So what's this one supposed to do?"

"Ah, well..." Kade thought for a moment. "Burn resistance!"

"Burn resistance? Like a Burn Heal, but preventative, to help people train fire Pokemon or something?"

"Something like that! You know me, I always think of projects before I think of how useful they'd be."

"Yeah, I know, I know..." Ari replied, rolling his eyes a bit but smiling despite himself - his father's ideas were a tad eccentric but as such a bit entertaining as well. "I guess I'll be your test subject again!"

"Excellent!" the professor exclaimed, quickly turning around and pulling over a hot-plate magnetic-stirrer and mixing the orange- and cream-colored liquids together. "Yes, yes... mix 'em up, little bit of heat..." he set down the orange-liquid beaker, "too bad this one had to start chilled," he re-capped the cream-colored liquid, "let those churn together... Add a little bit of binder," he said while using a pipet to add two drops of a dark, very opaque liquid to the mix, though it didn't change the overall warm color of his experiment.

He fell silent for a moment, just listening to the hot-plate-stirrer whir. Ari craned his up and to the side a bit to get a better view of the serum as it processed, glancing back and forth curiously between the mixing beaker and his father's face to gauge his expression. Finally, after a minute or two, the senior husky nodded and turned off the power to the device, letting it settle before reaching for a nearby drawer and pulling out a syringe.

Ari squirmed a little bit in his chair, even though it ultimately wasn't a big deal - he was old hat by now when it came to having his father prick him with various things for his experiments. Still, needles oddly made him shiver any time he saw one, despite his familiarity.

As his father drew up some of his "burn resistance" serum, the young husky pulled of his t-shirt - he seemed to take shots better in the back than in the upper arm. He lay his forearms down on the table, leaning forward a bit, as he felt his father come up behind him.

"Nao dis will ooownnnly feel like an itty bitty pinch, okay?" his father said in a baby-like tone.

Ari groaned, rolling his eyes as he felt the stick on his middle traps. "Come on, dad, you know that voice's sixteen years too old now!"

Kade ruffled his son's headfur, chuckling deeply. "Never too old for my boy!" The cream-colored husky strode over to another side of the central lab table and picked up a clipboard and pen, ready to take notes. "Now, I don't know exactly how long it'll take for this serum's effect to take hold, but I'm guessing you should start feeling it soon enough."

"So this comes with a sensation, you think? Am I gonna feel cold to fight off heat, or warm to be insensitive to it?"

"You should start feeling it soon enough," Kade repeated, now just watching his son intently, with a hint of a mad scientist grin.

Ari huffed a little at the non-answer. "Fine. What are you expecting to observe with me anywwaaayyyy...." He trailed off then, starting to feel a spot of warmth in his upper back muscles. Really warm, actually; he craned his neck to try and look over his shoulders, wanting to see if anything actually was happening back by the injection spot. Of course, he couldn't see much from that angle, so gave up and settled for squirming in his chair a bit as he just focused on the sensation.

It was spreading, too - a moment later, he felt that warmth seem to seep into the center of his chest, at which point it flowed outward through his system to make his entire body, toe tips to the tip of his nose, share the heated sensation. He started to say "Wow, that's impressi-" when he stopped again, the feeling changing a bit.

It was seeping into his muscles, and even into his bones, in a way he'd never felt before, and certainly wasn't expecting for something meant to prevent burns! Those were just surface things! Why was all this warmth going so deep into his body?

The energy going into his muscles and bones was making him feel the need to stand up, as if ready to get moving. "Dad, what - ?" he started asking, but was cut off as a pang suddenly laced across his back. Split seconds later, the heat in his bones started feeling like stretching, the husky starting to twitch a little as his longest bones felt like creaking and cracking; bones weren't meant to stretch and expand! His muscles, too, seemed to be convulsing in the heat, feeling as if they were swelling like marshmallows in a flame...

Ari crouched down, starting to whine a bit as his body was under assault from its own heat. Even his own skull ached, his jaws feeling like they were being pushed wider and the dome of his head feeling ready to burst from the pressure inside. His body was doing its best to deal with the heat, the husky getting the feeling that strands of all this energy were leaving his skin in their own little pricks from the inside outward.

Eyes screwed shut, Ari could only hunch and feel as his body seemed to revolt against whatever it was that his father had injected into him! He just hoped it would pass soon - burping for four days had been bad, but it was only the second time any of his dad's Ari-tests had lasted for more than a day and a half or so. As long as this didn't last much longer...

Was he actually swelling? As time went on, it started to feel like his shorts and boxers were shrinking on him. They were getting tight around his hips and all...

But as his shorts tightened around his crotch, the pain already seemed to start fading. The heat, though, was not - if anything, it was getting even warmer! As hot as he was beginning to feel, though, he must have just been getting used to it, since that part of this whole ordeal no longer seemed to be bother him as much.

His shorts were definitely becoming an issue, though. As the pain faded from his bones and muscles, it concentrated right in his groin where the seam of his boxers seemed to be cutting into him. Whining, he tried finding the proper level of squatting that minimized the pain, though soon there didn't seem to be one. He might just have to take his shorts and boxers off... It wasn't like he hadn't been naked in the lab before, but he always felt overly exposed in the cold, sterile lab area any time it occurred.

He went to try sliding his thumbs into his waistband - and promptly fell backward onto his rear when he opened his eyes, gasping at what he saw.

Sticking out from the stretched, straining legs of his shorts were big, muscular legs covered in thick, soft, orange-and-black-striped fur, anchored by paws well bigger than he was used to. He then saw his arms and legs, larger than they had been ten(?) minutes ago and covered in that same orange fur.

Ari started looking over himself more but was soon interrupted by an unimpressed "huh" from over at the other side of the table.

"Well, not quite one hundred percent there, it seems..." Kade instantly set his clipboard down and reached over for his lab notebook, pouring over his notes to see where the slight shortcoming might have been.

"Not one hundred percent of wh-?" Ari began asking, but then it hit him. His face flushed, heating up even more than his new normal body temperature and sputtered "You t-turned me int-to annn Arc-can-nine??" as he hugged his arms in front of his chest.

"Tried to, at least," his father said matter-of-fact-ly without looking up from his lab book. "But clearly the tranformation didn't go all the way... Your stripes are kinda spotty, you're missing the ankle and wrist tufts, and your ears are still clearly husky."

"Y-you said-d the ssserum was f-for burn resistance!"

"And fire-types don't get burns," was the ready retort, the older husky still pouring over his notes.

Ari whined a bit from a combination of the surprise of the situation, his father's apparently complete indifference at the moment, his emotions at suddenly being his absolute favorite Pokemon species, and the pain in his crotch from his too-tight boxers nearly cutting off the supply of blood down there. Well, at least one of those four things could be immediately addressed...

The husky-Arcanine hybrid had a bit of trouble sliding his larger, rounder fingers into his stretched-tight waistband, but after a moment or two he finally managed to peel the straining fabric off of his hips and thighs, giving Ari a close-up view of his newfound crotch. Yep, that was clearly and Arcanine sheath and balls down there... the former of which already seemed slightly swollen, simply from the fact that he was now a naked, upright Arcanine instead of a small-ish husky guy.

Damn, he looked good, too! The young canine was a bit conflicted... Was it narcissistic to be attracted to yourself if it wasn't your normal body? He had some serious abs now... And his arms and legs had noticeable muscles as well! Not that he had been weak at all before, but he had never been able to "get big" like his father.

That got him thinking how he actually compared to his father now in terms of size... He walked over to where he dad was sitting and scribbling in his notebook. He waited a minute or two, occasionally trying to peek at what his father was reading and writing, before finally clearing his throat and asking "So, uh, did you, like, program a certain size into the serum or something?"

Kade put down his notebook at that point, smiling as he stood up and placed his hands on Ari's shoulders - which Ari noticed meant out and up slightly. "Not specifically, but the transformation certainly is supposed to make the test subject get bigger! That part has definitely worked on you, as it looks like you're maybe an inch taller than me now, and your shoulders and inch or so broader than me, too! So yes, I think I count that as a successful part of the serum so far."

"So far... So am I going to change more? Or is it just some tinkering you need to do with the formula?"

"Neither, actually, I think. The formula itself is correct, but I'm thinking it just didn't mix optimally. The Arcanine D.N.A. component was a couple days old and had been chilled to help preserve it, but I'm not sure how well it actually preserved and I'm ninety-nine percent certain that the chilling aspect slowed down some of the necessary kinetics. I think if I had fresh Arcanine D.N.A., it would mix correctly and make a one-hundred percent effective serum."

"What counts as fresh Arcanine D.N. - AIEY!" Ari yelped the last letter thanks to his father's sudden motion to cup his paw under his son's new Arcanine balls. He shivered a bit, ears flattening back submissively as that familiar naughty smirk crossed his father's muzzle.

Even with Ari now slightly larger than his father, Kade was still able to lift the husky-Arcanine hybrid up by his hips fairly easily, sitting his son down on the center table. It still elicited a bit of a grunt from the muscular professor, of course, which wasn't usually the case when he threw his son around.

Ari's Arcanine sheath had already been slightly swollen just from the fact he was now (almost) an exact, studly model of his favorite Pokemon; his father's forwardness and show of strength was further exciting him, a black tip starting to peek out of said sheath as the cream-colored male pushed his knees apart.

Kade's muzzle buried itself in Ari's crotch, hands on his son's rump as the dominant male's tongue dove down into that sheath in an effort to coax the newly large, recolored member out into the open - or, rather, into his own mouth.

Up above, the husky-Arcanine hybrid's eyes crossed as a long, deep moan escaped his lips. Playtime with his dad was always fun, but now being part-Arcanine with a much higher natural temperature was making the experience way more intense for the young canine... He spread his legs almost instinctively as his erection quickly filled out his father's experienced muzzle, his Arcanine-sized balls beginning to draw up already. His big, fluffy tails started wagging lazily in pleasure as Kade worked his magic, which was normal - but now started to be a bit of a problem as some clinking and clanging noises could be heard behind him as his tail flopped (gently, for now) into some of the lab equipment there.

Kade paused, muzzle still completely surrounding his son's pride, and gave a little "hmm" around that meat as he considered his lab materials. He pulled back, releasing Ari's spit-slicked dick with a slight "pop" to let it slap up against the younger canine's abs. "Well, we can't have that..." he mumbled before pulling his son's hips forward and off the table, the two of them quickly dropping down to the floor, Ari's back up against the table's side.

The professor leaned back down toward his subject's crotch, smiling and puasing a bit to fondle his family's jewels, making his son squirm a bit, though also giggle slightly. "Yes, you've definitely gone full Arcanine down here, at least... Should get me some great, pure D.N.A." Kade mused before leaning all the way down and slowly, achingly sliding his son's meat back into his maw, led in by his tongue.

The boy whhined needily as that muscle cradled the underside his member until his father's lips closed at the base of his member. He had only gotten a moment to get a good look at his new junk, and was fairly certain he was bigger than his father right now... Not that it seemed to matter, the professor effortlessly making that pillar of flesh vanish into his mouth - and maybe even into his throat, by the feel of it. Ari couldn't help but hump slightly up into his dad's muzzle, despite the older male's grip on his hips.

One of Kade's paws moved from Ari's rump to his balls, fondling them as he blew his son's member. Ari didn't last much longer, howling a moment later - a deep, strong Arcanine howl - and erupting into his father's muzzle. The younger canine was completely, thoroughly lost in pleasure for at least a full minute, his Arcaninehood pumping thick, hot seed into Kade's maw almost endlessly. The older husky's cheeks slowly started ballooning out, doing their best to hold as much of that precious Arcanine D.N.A. as it could, though he couldn't help but swallow once or twice as he kept his lips sealed around his son's meat.

Finally, Ari's climax died down, and between his orgasm and the strain of the earlier transformation he was suddenly very tired. He watched, vision going a bit fuzzy, as his father stood up, a paw rubbing lovingly on top of the younger canine's head between his ears. Before he completely passed out, the husky-Arcanine hybrid saw his father open up the front of his labcoat (he was wearing nothing else underneath) and dribble out nearly a pint of Arcanine cum into a beaker...

Ari stirred again an hour or two later, still seated on the floor naked, still a husky-Arcanine hybrid, and still at half-mast. He whrrfed and rubbed his eyes before tilting his head up to look around. His father was a few feet away, apparently drawing up a fresh batch of his serum into a syringe again.

The older male turned when he heard his son's waking grunts. "Ah, you're up! Excellent." He set down the syringe, turning to face Ari - in the process showing off his fully-erect member sticking out from his open lab coat. "How are you feeling? Still warm?"

The younger canine was at a loss for words at first, both from having just woken up and from being at eye level with his father's prominent rod. Yes, he was certainly feeling warm, particularly in his cheeks and ears... "O-oh! Yeah, yeah I'm still feeling hot, th-though not uncomfortable; I guess that's normal for a fire-type. Aside from that, still waking up a bit, but otherwise just f-fine!"

"Great! Well, you've woken up just in time for me to take a second stab at this Arcanine transformation thing." Kade then turned back to his work, picking up the new syringe and tilting his head to the side as he stuck himself in the neck.

Ari swallowed a couple of times, trying to keep his mouth from going dry as he watched and waited to see his father begin transforming. There were several moments of nothing obvious happening, though the younger canine could swear he could "see" where the warmth was spreading through his father's already muscular, exposed body. His father's ear twitched at one point, making Ari guess he was starting to feel the pain of his bones stretching and expanding. His expression also changed minutely, going from pensive to slightly uncomfortable.

Just when Ari thought his father was going to completely show him up in terms of pain tolerance, Kade's eyes closed, head twisting down a bit, a low growl rumbling in his chest. Now, the husky-Arcanine hybrid usually felt a little bit of a rush any time his father growled, but he could feel his pulse go up more than normal as Kade's growls changed tone... Halfway through one, the older canine even managed to growl out "ooohhh... yeaaahhh... mmff that's strong..." through gritted teeth, as if he was almost feeding off the pain. Which made sense to Ari, in a way, since it meant the transformation was working.

And oh, was it working! The younger canine's eyes were wide, transfixed on his father's body as the outward signs of change were starting to show. Fur starting to slowly change hue, growing a bit faster in some places... muscles swelling up, most visually on his arms and legs... even his height starting to grow... as was his erect member. No change was sudden, like a sudden splash of color or a muscle blowing up like a balloon, but barely a minute later, it was clear - there was an anthro Arcanine standing there, open labcoat straining around his gigantic shoulders, where his father had stood moments before. He was there still, but so changed... Ari had thought his dad was big and strong, but he seemed at least a foot taller with muscles to match now! And there was no way he was going to be able to close that labcoat around his front even if he tried to do so.

Kade stood there for another moment, panting heavily as he got used to his new form. The then growled, barked, and laughed, making Ari jump a little bit from his position seated on the floor. "Aha! Success!! And oh man, I'm burning up and it feels so good! I've got so much energy I feel like burning off!" He then observed himself as best he could, wide-eyed and smiling, half-reaching for his clipboard before instead choosing to feel up his new muscles and new, still-hard, bigger-than-before black Arcanine dick.

Still holding his member, he looked up with a smirk, just slightly licking the side of his lips as he locked eyes with his son. His free hand beckoned the boy over. "Oh, Aaarrriii...."

Ari shakily got up to his feet, now completely hard again himself, completely turned on by having watching his father's body morph from already-studly to essentially his dream partner, a god-like Arcanine man. He shuffled over to his father, the tip of his own member brushing against that of the professor's as he rested a paw on that strapping chest and looked up (definitely up) to make eye contact again. "Y-yes?"

Kade's only answer was to bring his free paw around the back of his son's head, pulling him in for a deep, heated kiss. Ari whimpered and almost lost control of his knees at that, though he got an arm around his father's back as the distance between them disappeared, their warm bodies pressing and rolling against each other. kade's tongue jammed into his son's mouth, the younger canine sucking on it as it lashed around his maw, claiming it all. Ari could feel their erections rubbing against each other, noticeably hotter than the rest of their bodies as his father's paw took them both at once and started jacking.

They stood there, kissing and writing against each other for a while as the paw on Ari's head slowly slid downward, rubbing his sides before giving a firm, confident squeeze on the younger canine's rump cheek, making Ari squirm excitedly.

Kade broke the kiss, panting in his son's face for a moment before turning the husky-Arcanine hybrid around, pushing his chest down to the lab bench and pulling that fluffy tail up and to the side. "Man, you're hot with all these new muscles, Ari..." he said, hotdogging his still-dry member between his son's exposed cheeks. "Though I gotta say, those spotty-stripe and husky ears are still irresistibly cute..."

Ari gave a happy whine at the compliments, and was about to say "thank you" when he yelped instead, his father's new rod already jamming itself halfway into his tailhole!

"YYYIPE! Daaaaad!"

Kade gave a gently spank to one cheek, chuckling a bit. "Oh, I've been rougher with you before, and you still love it!"

The stud-pup had no real retort to that, instead sighing with pleasure as he felt that pillar of flesh inch its way further inside him. He finally felt his father's new pubes brush against his tailhole and wiggled his hips slightly, just to feel that monster inside him. He at first had no clue how he fit something that big inside relatively easily, then remembered that he himself was bigger now than he used to be, making him smile a bit as he grabbed the edge of the bench and flexed his new arms as he braced himself for what was coming next.

His father slooowly pulled out at first, just as he knew Ari liked it, then slammed his way back in, making his hybrid son bark out in a fiery mix of pain and pleasure. Within moments, Kade was thrusting at full speed, repeatedly bashing his son against the lab bench. It definitely hurt more than usually, the elder Arcanine having gone in essentially dry, but the pain almost felt good when combined with the much higher body temperatures of Ari's tunnel and his father's pride. It anyway didn't stay dry for long, both fire dogs soon drooling pre from their respective members, Ari creating a small puddle on the floor beneath as his passage quickly lubed up with his father's juice.

The heat between them was intense, especially when Kade leaned forward, wrapping a bulging arm around his son's torso as he took one of those still-husky ear between his Arcanine teeth, getting an extra hold as he pummeled the younger canine's hips with his own. Ari could feel his father's knot knocking at his back door and did his best (given his position) to push backward into his father's powerful thrusts. Soon enough he got his wish, yelping and whining as his father's big, black knot loudly popped inside him. It came out once as Kade pulled back, but it popped in again on the return swing, Ari clenching down hard to keep it in as it continued to swell from there.

The two of them rocked hard against lab bench for another minute or two before Ari couldn't take it any more, letting out another howl as he climaxed for the second time that morning. He wasn't spraying nearly as much as he had the first time, but his rump muscles convulsed just like normal, milking and rippling over his father's rod. That soon sent the older Arcanine over the edge as well, adding his own howl in rich harmony with his son as his pride erupted more like a firehose than with pulses. The professor was producing at least three times as much cum as his son originally had, the younger canine panting in afterglow as he felt his midsection fill with his father's seed. His newfound four-pack started bulging forward against the lab bench a little bit, none of the cum being allowed to leave his tailhole thanks to the strong tie of his dad's knot behind his unrelinquishing tailhole.

Kade simply lay there on top of Ari as they rode out the professor's orgasm, the two of them enjoying each other's closeness and kissing lightly as well. Soon enough, maybe too soon, the flow ceased. Ari wiggled his hips against his father's crotch, testing the tie (not going away any time soon) and also feeling the sensation of all that cum inside him. It was all sloshing around in there, his four-pack almost stretched to the point of losing definition.

His father patted his side and kissed the back of his head before straightening up, a paw still on Ari's back as he reached over for his clipboard and notebook. Ari's ears perked up questioningly, trying to see what his father was doing, soon discovering said clipboard settled on his back as his father reached over for a pen. He started taking notes about the experiment then, using his own son's back as a stand-in for a desk.

He caught his son's eye. "Oh, don't look at me like that! You know as well as I do that we're stuck like this for at least an hour, based on how intense that fuck was, and I still have to make sure I get all of our observations down! You like helping out with my experiments, right?"

"Yes, dad..." came the reply, the husky-Arcanine hybrid blushing a little bit as he accepted his (temporary) role as a writing station. As his father wrote, he idly wondered how long this "burn resistance" serum's effect would last...