My Beautiful Dark Twisted Fantasy

"Guhh…" Twilight moaned. The salespony she bought this treadmill from said it was enchanted to make her body perfect, but at this point she was pretty sure that was a lie. Better go find them sometime. What was their name again?

Twilight was at a loss. How could she forget? She only bought this thing two days ago! Was it-

She couldn't think, because at that moment, her stomach churned painfully, and she let out a massive burp. "Bwa?" She muttered stupidly. She didn't notice her belly bloating up again, this time pressing against the edges of the treadmill. Yes, it was enchanted. Her mind had leaked down to her stomach and was being expelled with every burp and fart that exited her growing body. Her memories, her friends, family, everything she ever learned, was being blasted out of this pony foghorn. By the time she realized what was happening, it was too late.

"N-nuh, gotta find help! G-gotta get offa dis ting-" She cried inarticulately as she tried to waddle backwards, but her body was already wedged so tightly between the rails that the only way she would be getting off was by bursting through.

A brown trickle began between Twilight's legs, then it expanded to a stream, then, with a deafening fart, chunks of diarrhea flew from between her flabby ass cheeks and splashed across the bookshelf behind her. Priceless books were now covered in hot, slimy princess shit. With it, all remaining signs of the pony who once inhabited this body were gone. With a *snap*, the railings gave way to its growing flab, and the mindless body fell to its side. With no control over itself, a yellow puddle formed beneath her backside, mixed with logs of shit and more diarrhea. Princess Twilight was no more.

Outside, Rainbow Dash knocked on the door to the library.