Jeremy fell onto his back.
then, he kicked off his shoes, and pulled off his socks, leaving his feet bare. His toes wriggled and flexed like worms.
all of a sudden, he, Lucille and Izzy all watched, as Jeremy's feet were elongating right in front of them, like in the transformation scene from "An American Werewolf in London". The toes grew freakishly long and webbing formed between them.
Lucille fet the webbing in between her husband's toes. it was soft, cold, and gelatinous.
"Wow, honey." she said. "Your feet look impressive!"
That made Jeremy cheer up. "Ya ain't seen nothin' yet, honey!" he said, gettin' up, and rolling up the legs of his pants a bit.
took a few steps with his new feet. It was a strange sensation, walking with such funny feet, but it was very amazing. It reminded him of a past family vacation when he had gone diving with his family and he had been walking around with flippers on his feet.
"You look cool, DAD!" Izzy said hugging her web-footed dad.
Jeremy was of course, transforming into a fish.
but it didn't have to be a FULL fish; he could be part fish too.