Long running joke from my mother's father.
How do you make a cat go woof? You soak it in gasoline and light it up. They did it in the medieval ages, then they'd load'em up onto the catapults (why do you think they're called that?)
I was challenged by cardcaptortsuki to participate in her Nothin' But Nekos wallpaper contest. I immediately whipped this up as a response. Moral of the story: I'm not a F***ING cat person.