The next day, Vince returns home from school, and found the house empty; His dad was not yet home from work, and his mom was away at a conference in the city, which he realizes upon discovering a note on the refrigerator.
This gave him some time to play basketball outside in the yard, before they came home.
So he went out into the yard to play basketball.
After a minute or two, he felt a sharp pain in his feet.
He kicked off his sneakers, and let his bare feet (he doesn't wear socks under his shoes) breathe. Then, to his surprise, his feet grew bigger, like in the transformation scene from his dad's favourite movie, "An American Werewolf in London".
they were 3 sizes bigger than his normal shoe size (7).
His arms and legs lengthened, and his hands grew bigger, like his feet had before.
He saw his pinkie toes shrink into his feet, so his feet now had 4 toes on each foot. And the same thing happened to the pinkie fingers on his hands, so now his hands had 4 fingers on each hand.
His skin turned a bright blue, his ears became round and big, almost monkey-like, and his shirt vanished, leaving him in his basketball vest and shorts.
Small wings grew on his back, small pointy horns grew on his forehead, and a short stumpy tail grew from his behind. And he gained 2 extra eyes on his head. Throughout all this, His hair remained the same colour.
Vince caught sight of his reflection in the glass of the window. He was a monster!
"Alright!" He cheered. "Chris was right! The monster tf site does work! I really am a monster!!!"
Vince the monster kept on playing basketball outside in the yard. He was now a monster, and he enjoyed every damn minute of it!