There's a kid with loads of new firemen equipment and sees a fire engine go past and the kid asks the firemen, "Come have a look at my new gear." So the firemen go look at his gear, so then the kid says:
"I've got a helmet, a big jacket, and an oxygen tank, and a little wheelbarrow for my gear."
Firemen say: "Why is there a rope tied around a cat's balls?"
The kid says, "So I can have a siren nnnnnnnnnnneeeeeeeeeeeeeeeeeeeeeewwwwwwwwwwwwwwwwwwwwwwwwwwweeeeeeeeeeennnnnnnnnnnnnnnnnnnn"