1. Venom's Cronos  
The 10-minute recording of Venom singer Cronos ranting between songs in New Jersey in 1986 is perhaps the most widely circulated stage banter in history, and for good reason: The quips are insane and unintentionally hilarious. The show was recorded by Black Flag roadie Joe Cole (Black Flag was on the bill, inexplicably), who edited out all of the music and left only lunatic ravings. Thurston Moore released it as a single on his Ecstatic Peace label, and the Beastie Boys would later sample "You're wild, man, wiiiiiiiiild" on
Check Your Head. Whether Cronos does this shtick at every show is immaterial: He became the king in just one night...  
With audio and video clips.
bear: this is super cool