According to Clash bassist Paul Simonon, the secret behind the Clash's London Calling was their producer, Guy Stevens. "He brought out the best in everybody," Simonon says. "And he was the crazy one that let us not be crazy and get on with the job. I think if you put us all in the room together you'd look at Guy and you'd say, 'Yeah, he's the crazy one. Those other guys, they're the normal ones.'"
This was quite clear when they recorded "Death or Glory." "Guy lost it when we were recording that," said Simonon. "He ran into the room picking up chairs and smashing them against the wall, and we're thinking 'He's gone insane,' while still playing the song."