"Shit! Professor, I think it slipped into the groundwater!"
"Damnit, Jeffrey, no! If they government finds out about this, we'll be toast! They'll land us in Gitmo if word gets out! Stop that leak as soon as you can!"
"OK, sir!"
~~~~
Unbeknownst to the scientists, however, their top secret chemical had already diffused through the groundwater, some of it even reaching one of the many streams traveling through Grandview State Park. Also traveling through Grandview State park on this fateful day was Alexis Eriksen, a short 5'2" teen taking her normal afternoon walk through the forest. She liked to take walks, but not so much for the exercise: she'd always been slightly chubby, but never too much that she couldn't hid it with a baggy t shirt or two. That was, except for her ass. Alexis had always had a larger than average bottom, but she was proud of it. Her hips and ass made her feel powerful, even at her petite height. No, she enjoyed walking through the park because of the nature, the beauty of the area she called home.
"This place is so pretty! All of the colours have finally started coming out!" she beamed, noticing the first signs of fall edge through the tree's changing leaves. She continued her trek, happening upon a small stream lined with pebbles. Feeling adventurous, she decided she’d try to jump over it.
“Here we goOOO-WHOA-HWOAH!” she cried, slipping backwards after her landing, landing her ass right into the stream! “Ah, shit, and I liked these pants, too,” she moaned, quickly getting up, her soggy jeans making movement uncomfortable. She decided to sit down on some of the dry rocks at the side of the stream, so her pants could dry off some. She had a few hours to kill, why not take a rest? She sat down on one of the larger rocks, so she could dangle her feet some and just watch the stream tumble by.
As she was taking some r & r from her afternoon trek, however, something didn’t quite feel right. Her jeans never loosened any, instead, dry as they were, they seemed tighter?
“Oh, what the fuck is going on,” she cried, brushing her long, dyed blue hair out of her face as she looked down. She felt the pressure in her jeans build and build, eventually becoming unbearable. Try as she might, however, she couldn’t get her jeans off. It seemed her already large ass was swelling up, right before her eyes!
“Holy FUCK!” Alexis screamed as she saw the seems along the inside of her thighs give way, her pants quickly completely decimated by her growing derriere. She cried slightly as she watched the lack denim shreds slip off of her now more massive ass, “but... but these were my favourite pair...” she cried, saddened by the loss.
She felt herself rise higher and higher on the rock, being pushed farther and farther forward, presumably by the changes happening to her skeleton to support her growing hindquarters. She noticed her shoes were getting quite uncomfortable themselves, so in a vain effort to save them, she pulled them off as fast as she could. She looked at her feet, and she realized they were turning into... hooves? Her toes merged before her eyes, painless yet she still flinched, while her nails grew larger and larger, covering the ends of her... toe. They stayed the same intricate pattern she had painted them the morning before, but the designs became more fitting for her hoof as it grew, changing as it changed. “Oh my god...” she sighed, “what the fuck is happening?”
The changes were overwhelming. She felt everything swirl and get darker, feeling her ass jiggle immensely over her as she slipped face-first into the ground below her....