The Awl reports:

Whatever power of Spinks’ entrance had immediately evaporated when a deafening drone of noise started swirling in the air. As it crescendoed into a maddening roar, the crowd at the Atlantic City Convention Center arched to follow the procession of men, all cops and security guards, emerging out of Tyson’s locker. Tyson, bare-chested and already soaked in sweat, slowly materialized from the back and meandered to the ring, barely blinking. The broadcast announcer Bob Sheridan, struggling to define the scene, played it straight: “It’s interesting Mike Tyson selected as his pre-fight music just noise; every once in a while you hear the clanging of chains. I think that’s what he’s got in mind to do to Mike Spinks’ head, but we’ll wait and see. Everything that Tyson does is intimidating.”

The “noise” was in fact a song by the British band Coil.

Full Story: The Awl: A Man Walks into a Boxing Ring

Via Metafilter, which casts doubt that the song was in fact by Coil. I can’t really hear it very well in the video, so I’m not sure, but I don’t think it’s the Sergio Cervetti song that one of the Awl commenters suggested either.