Before Sid Vicious was in the Sex Pistols he asked Lemmy Kilmister to teach him to play bass. But only after a few days Lemmy gave up and said "Sid, you can't play bass" Sid replied "No, I know" and walked away. A couple of months later Lemmy met Sid at The Speakeasy in London.
Sid Vicious: "Hey Lemmy, guess what! I’m in The Pistols."
Lemmy: "What do you mean?"
Sid Vicious: "I’m the bass player in the Pistols. It’s great, innit?"
Lemmy: "You can’t play bass, Sid."
Sid Vicious: "Yeah, yeah, I know, but I’m in the fu**ing pistols!"