"Bass quitar player is strangling a little kid" joke

I was walking down the street one day, when I saw this guy strangling a little kid.
"What's going on here?" I asked.
"I was playing bass in that club," says the guy, "and this little punk ran in and twisted one of my tuning pegs."
"That's horrible," I said, "but it's no reason to brutalize him."
The guy replied, "Well, he won't tell me which one he messed with!"