Tommy Lee knew he could never compete with Ozzy Osbourne's wild ways when he found the rocker smearing his own excrement on the walls of his hotel room after one particularly crazy drink and drugs binge during the 1980s.
Lee witnessed the extent of Osbourne's bizarre behaviour in 1984 when his band Motley Crue joined the former Black Sabbath frontman on the road.
The drummer admits even he was shocked by the amount of booze and illegal substances Osbourne took during that tour - and he vividly recalls the moment he realised the Brit had completely lost it.
Speaking in candid new film documentary God Bless Ozzy Osbourne, Lee remembers how he tried to take Osbourne back to his hotel room to rest - only for the singer to take a dump on the carpet and begin making a complete mess of the walls.
He recalls, "I'm pushing him into his room... and he takes a s**t right on the floor! ...I turned around and saw him smearing s**t all over the walls. I though this is my chance to leave. I pinned it out of there! I thought, 'This is some next level s**t. I'm old, taking a s**t in the toilet!'"