Steve was in the Navy, and had a friend, let's call him Bud, who had grown up in Iowa. Steve asked him what he did for fun in Iowa.
"We spent a lot of time bagpiping cats," Bud replied.
"What the hell is that?"

"Watch," he tells Steve.
Bud takes the cat's tail and places it in his mouth and bites down on the tip of it. Immediately, the cat begins a loud "YEOWWWLLL!" He then squeezes the cat's head with his left arm, until he gets a pitch he wants, "YEooowWWWoooWWWooooWWWLLLLLlllll!"
Steve is laughing his ass off, and cannot believe he what he just witnessed. Bud lets go of the cat, which promptly takes off down the alley like a bullet.
"Now you know how to bagpipe a cat!"