...well it was hard to tell at first what it was. It was pointed towards the bus, head down grazing. But then the oddities started to become apparent. It's rear was twice as wide as it's front, making it seem oddly shaped from this angle. What was also apparent was it's giant sack, hanging down below it's legs. That was all Jen had time to see as she stood up and yelled "Stop the bus!"
In a panic the bus stopped, and Jen practically flew out of her seat to run out of the bus. Down the steps she went, shoving open the door as she turned and ran into the field. It took a second for her to climb the fence, and when she landed she saw the horse looking at her. It watched her as she sprinted at it, the horror growing as she got closer. As she got closer she noticed more details about the horse. It's ass had to be nearly 7 feet across. The sack below it's legs was huge, looking like a yoga ball stretched beyond it's normal size with how full it was. But then she noticed what was attached to the sack. A stump of a sheath was attached to it's groin, hiding what be a massive cock. She didn't get time to find out. As she ran closer she whimpered "No no no no no no.." repeatedly until the two of them collided. Jen blacked out.
When Jen awoke, she felt wrong. She tried to push herself up, but it came from the wrong place and felt wobbly. As if she was on new legs. She opened her eyes and had to suppress a scream. Her classmates surrounded her but were nearly 12 feet below her. She had to be at least 14ft tall now. Her hips met were the horses head used to be, her shirt hanging only around her neck.
Now she could feel what made the horse so different. Several huge pairs of testicles all churned within her sack. The stump of a sheath? It actually was 5 cocks all together in there. Thankfully she wasn't feeling horny. As for it's rear she never got a look at? Now she could feel ten huge assholes all between those gigantic horse legs. Of course to power all that she felt a huge hunger, and needed to eat soon.
"Jen! Are you ok?" The teacher asked. "You ran out of your trailer into the field then passed out." Jen could see a huge trailer being hauled behind the bus, clearly to house her. Not only was she 14ft tall, but as she looked back she had to be nearly 18 long as well. "Kyle... That bitch.." she whispered above everyone's head.
"Well, you're up now so if you can walk you can make it to the main building. We're here after all."