It was 28 years ago, on that warm (and fateful) October night in 1991 when Nirvana played a show at Trees in Deep Ellum and all hell broke loose. Kurt Cobain was stage-diving, and when bouncer Turner Van Blarcum pulled him back on-stage Kurt bopped in the head with his guitar. Van Blarcum retaliated with a right cross to Kurt's jaw and a near riot broke out. Eventually, the band returned to the stage and finished the show. Afterward, they were whisked away in a cab as Van Blarcum punched the windows, shattering glass over the band. The story goes that Nirvana (or their label) ended up paying Van Blarcum's medical bills and for damages to the venue.
You can see footage of the incident below, and scroll down for the complete show.