Just a slip of fiction

Fiction in 58, a little writing prompt I created a few years ago to tell a story in just 58 words. Good exercise for the verbose. Or, for those with attention disorders.

Evolution
He’s up there, my dad, goose-stepping across the tiled bath.
There’s a yelp, so I bound the steps by twos.
He’s holding a foot, twisted in some yoga pose.
“Hey, check it out.”
His feet have grown webbing. Thick skin between each toe.
He smiles.
“Run a bath,” he says. “Let’s see what these babies can do.”