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“OW! What the fuck was that!?”“Haha, chill out man, it’s just a prank!”Gerome wanted to punch his friend as he saw the huge pink syringe pull away from his body. Yet, as he formed a fist for his dick-bag friend, something like a stomach gurgle shot through him, and through all of him. His entire skin and the muscles beneath seemed to shift around as whatever pink had been shoved inside him took its foothold.The tremors lessened, and Gerome tried to take a step. His legs started to move, and bend at the knee, until both of them were sinking his body deeper.CLAP!Gerome went wide eyed. “What was…”“Oh… Oh hahaha, it really worked!” Terry yelled.Gerome twisted his vision to the other man and scowled. Except, all the anger he was trying to pump into his brow was slipping through. Like water surging down a drain, all the frustration spilled out of his face, down south, down towards his ass.CLAP CLAP!“What is… What’s my body…” Gerome stumbled.“Oh LOL! This prank is going way better than I could have imagined! Bro, your ass is so loud!” Terry continued.More rage, and now worry too, filled Gerome as his former pal laughed at him. Yet, that anger could hardly simmer at all, as the emotion slipped away down that same pipe it had before, down all his body, right into his ass muscles. All that annoyance came raging back as another loud ring.CLAP CLAP CLAP CLAP!Gerome didn’t like how docile he felt all of a sudden. Every clap of his ass seemed to almost completely pacify him.“What-what’s going on!?” Gerome asked, ass clapping just a little as it siphoned from this panic.“Bro, don’t worry, it’s just a prank.” Terry answered. “I just filled a syringe with clap serum and poked your ass with it, lol”What did he mean “Just a prank”!? Terry could barely control his body! More anger flared, his face finally surmising a frown, before it tripped and fell too, down where every expression beyond dumb, obedience landed. Terry’s ass raged hard with mighty, booming noises.CLAP CLAP CLAP CLAP CLAP“W-what is it doing to me!?” He asked.“Oh, don’t worry dude, it’s cool.” Terry assured. “It’s just, you’re going to have no control over your body for a bit. All your existence is going to slip into your ass and turn you into a mindless clap factory.Gerome didn't like the sound of any of this. He screamed in frustration.“You JERK! Turn me ba… T-Turn me…”Talking suddenly felt hard. All the neural pathways in Gerome’s brain that he used to speak felt gridlocked and impassable. Instead all his mind wanted to do, what it really, really needed to do, was spend that energy somewhere else, on this fresh crop of muscle memory that suddenly felt as natural as breathing. The part of his mind that formed speech barreled down to his ass, and made him toss those cheeks together even harder.CLAP CLAP CLAP CLAP CLAP CLAP!“Wow, it’s progressing fast. I think you’re losing to your own ass, dude.”“Wh-wha…” Gerome’s voice came back for a moment. His face felt wildly unwieldy to control with his rocking, noise backside. It was a struggle, every other muscle fighting to dedicate more power to throwing it back. Gerome truly felt like he couldn’t do a single thing without his butt making another outrageously loud clap to accompany it all. Even taking a simple step was impossible now. Gerome outright focused on trotting just a little forward. His ass rewarded him for his insolence by squatting deep as fuck, and rolling those heavy cheeks around hard“Bro, chill, it’s just a prank. I didn’t mean anything serious.” Terry continued, scooting behind his friends to watch those quaking cheeks do their work.His lips could barely make a sound “Uugh…”“Fuck man, you turn into a brainless twerk machine really nice.”What did he mean “brainless twerk machine”!? What an asshole! Gerome berated him with insults and…Ungh… Mouth not moving. Brain going funny…Gerome’s bottom clapped and smacked even harder at the insults, more adipose filling his backside as unneeded materials like smarts and thoughts converted into twerk fuel. His technique refined further as his unneeded brain turned to practiced muscles. Hip rocks made his cheeks smack and flail so desperately for cock.Terry watched all the while, entertained by the show. “You still in there bro? You wanna tell me off or just keep clapping?”Gerome was still there, of course. What, did Terry think he’d run off standing right here, with his spats down low and his bottom shaking? Terry reassured his friend he was still present. He tried to speak. That turned into claps, of course. Surely clapping was enough reassurance?“Earth to Gerome, you still in there dude?”Yes! Yes, Gerome’s still here! Gerome tried to yell aloud he was literally right in front of him. No noise fell from his gaping, drooling mouth still, nor did his head even spin around with those vacant eyes to grab his friend’s attention. His whole upper half could only move up and down as his powerful hips, growing thighs, and exploding ass clapped away every word in his throat to every thought in his head.“Damn, you’ve got a fucking clap factory now bro.”Clap factory… Hard to think. He had a clap factory? Wait, was clap factory a name? So hard to think. All thoughts slipping, falling. Everything turning into-CLAP CLAP CLAP CLAP CLAP CLAP CLAP CLAP“Dude, this is the funniest prank ever. This shit is so humorous, I’m like stupid erect. Thanks for being a good sport about it.”The clap factory had the same stupid ditzy look on his face, as before, vacant, unflinching, brainless. All the useful stuff for communication had given up in his wobbling backside.“Don’t worry bro, it’ll wear off in a few… Oh shit, uhh, don’t worry, I’m sure it’ll wear off. Hey, bro, for such a delightful prank, can I get you to like uhh deal with this thing?”The clap factory obeyed and let its gaping stupid drooling end be used as needed. So long as the clap factory could wobble, it was happy. And something about sucking on this nice man’s cock made clap factory throw it back extra loud…