A fire fighter is working on the engine outside the station when he notices a little boy next door in a little red wagon with little ladders hung off the side. The boy is wearing a fire fighter's helmet and has the wagon tied to a dog and a cat. The fire fighter says, "Hey little partner, what are you doing?" The little boy says, "I'm pretending to be a fireman, and this is my fire truck." The fire fighter walks over to take a closer look. "That's sure is a nice fire truck," the fire fighter says with admiration. "Thanks mister," the boy says. The fire fighter looks a little closer and notices the boy has tied the wagon to the dog's collar, and to the cat's testicles. "Little partner," the fire fighter says, "I don't want to tell you how to run your fire truck, but if you were to tie that rope around the cat's collar, I think you could go faster." The little boy says, "You're probably right, mister, but then I wouldn't have a siren."