A few come to mind. Seeing an act booed off the stage is always memorable. Especially when beer bottles have been hurled at the artists. So maybe it wasn't a great idea to have a reggae band (Toots and the Maytals) open for the Who in Detroit back when no one in Detroit had heard much (if any reggae). Mike Quattro opened for ELP in Jersey City and got the same treatment.
I also recall seeing a Traffic concert at which Chris Wood was so drunk/stoned that he lost hold of his sax mid solo and sent it flying across the stage.
At a Shirts show at CBGB some drunk up front got shoved and started a brawl that moved in slo-mo from the stage toward the back, where I was standing. I escaped seconds before some guy got slammed into the rear wall.
I also recall seeing a Traffic concert at which Chris Wood was so drunk/stoned that he lost hold of his sax mid solo and sent it flying across the stage.
At a Shirts show at CBGB some drunk up front got shoved and started a brawl that moved in slo-mo from the stage toward the back, where I was standing. I escaped seconds before some guy got slammed into the rear wall.