Two, actually: One for the music and one for the situation.
Saw Frank Zappa when he was touring after recording "Sheik Yerbouti," and he was great. This is probably my all-time favorite.
But I saw The WHO in Orlando in the mid-'80s, which was OK, but the opening bands were a little odd: Pat Benetar (she was OK) and the B-52s. Yes, the B-52s, who I particularly thought were OK, but not with The WHO and Pat Benetar. It was at a stadium -- I want to say the Citrus Bowl? -- and my younger brothers and I would go, like, 18 hours prior to the gates opening and be one of the first people in. They would rush to the front and I'd just hang in the back until the end of the concert and afterward we'd just meet up and go home. Anyway Benetar and her band played and she was good, there was a pause, and then the B-52s came on, and they started playing, and the rockers really wanted something more, um, edgy I guess. People started throwing things on stage after the first couple of songs and during the thrid, a shoe flew on stage, followed by several shoes, and then by scores of shoes. They stopped playing and left the stage and Daltrey Townshend and company came on about two hours later.
When we got back to the car, my brothers didn't have their shoes, which made the 200-mile drive to back to Miami pretty interesting.