Ozzy Ozbourne quit LSD after a dialog with... a horse

During the recording of Black Sabbath Vol.4, the rocker took 10 wheels of LSD and went for a walk in a field. There he met a horse and talked to it for an hour - until it turned away and said over his shoulder: "Hey, fuck you. You're annoying."

Since then, according to Ozzy, he hasn't touched acid again.