The final show by the Stooges until their reunion in 2003, Metallic K.O. is the only rock album I know where you can actually hear hurled beer bottles breaking against guitar strings.
Recorded 2/6/1974 at the Michigan Palace on a reel-to-reel tape machine by Michael Tipton, later obtained by Stooges guitarist James Williamson. Considering Williamson's involvement, and the endorsement of Iggy, it was considered a "semi-official" bootleg, when released on the Skydog label in 1976.
The album is mostly composed of previously unreleased material. Studio demo and rehearsal recordings of some of the songs would later turn up on similarly semi-official posthumous Stooges compilations.
The album proved popular, due to its release in the first era of punk rock and The Stooges' growing legend as protopunks. Metallic K.O. outsold The Stooges' major label official releases, selling over 100,000 copies in America as an import in its first year alone