Harry has an appointment at the dentist, but doesn't want to go. He says he'd rather keep playing. He ends up tossing a flying disc way far away and his Mom goes to get it, but warns him he'd best be ready to go to the dentist when he gets back. Harry decides instead to go into Dino World in search of more flying discs. In Dino World, Trike discovers that he has a hornache. Harry and the dinosaurs decide that he needs to see a horntist, but Trike doesn't want to go. He says he's heard bad things about horntists.