Ozzy Osbourne once signed a fan's colostomy bag.
The Black Sabbath frontman admits he often gets bizarre requests from his supporters and although he agreed to the autograph, he couldn't "even look" as he did it.
Osbourne - who famously bit the head off a bat on stage - said: "This guy asked me to sign his colostomy bag. He put his hands down his pants and plopped this pink thing on the table. I couldn't even look at it."
A colostomy bag - also known as an ostomy pouching system - is a medical prosthetic that collects human waste instead of it passing through a person's usual digestion system.
The rocker has also had many bizarre moments on stage, most notably when he ended up with several pounds of raw meat on his head.
He explained to Q magazine: "We had a big mechanical hand, which we rigged up with a rubber band to use as a meat catapult. But the elasticity had gone and they put too much meat in. I triggered it, ducked down, It crept forward very slowly and 30 pounds of sheep's testicle landed on the back of my head."