You rush into the room, as Joe drops a handful of animal crackers on the floor. His body is already writhing as it attempts to change. He must have eaten a dozen crackers in one mouthful, since his body seems to be fighting with itself as to its final shape.
His trousers rip off his body as his lower half becomes first a fish tail, and then a mass of suckered tentacles. His arm is a lobster claw then a hoof. He throws back his head and screams or bellows in agony. His head is a goat's, no, it's a bull's, no it's a lion...no, a goat's again, oh wait a swordfish, no, lion. You pull up a chair and sit down to watch the show. Joe's own head appears for a moment, and you wonder if he ate a human cracker too. Hm, how many human crackers were there in that box...