A fireman was working outside the station when a little girl wearing a firefighter's helmet rolled up in a wagon that was decked out like a firetruck, complete with a stepladder hanging from the side and a garden hose coiled up in the middle.
Pulling the wagon were a dog and a cat, each tethered by a rope---one rope to the dog's collar, and one rope, strangely, to the cat's tail.
"What a great firetruck!" said the fireman. The girl smiled. "I don't want to tell you how to run your rig," the fireman continued, "but I think you could go faster if you tied that rope around your cat's collar instead of his tail."
"You're probably right," said the little girl, "but then I wouldn't have a siren!"
