Mid 1980s in little Springfield, IL. Aerosmith was the headliner. I was psyched to have seats about the 10th row. Steven Tyler was SO F**ked up, he couldn't sing the first song intelligibly. If you have seen an Aerosmith concert, Steven uses the microphone stand as a visual prop. He kept dropping the mic stand. Steven left the stage, Joe Perry stepped up and sang song #2, and well. Steven came out for song #3, obviously had been showered, hair still wet. Steven starts to sing Back in the Saddle. About 1/3 of the way through the song, Steven sings to the front row, leaning forward.....
And falls into the orchestra pit. Lights come on. Show over. 2.5 songs into the concert.
To make up for it, no money was refunded but we all got a copy of Aerosmiths Greatest Hits. Now, who at the concert didn't already have that album would be beyond me. Of course, Tyler cleaned up his act and I actually went on to see them a few more times. Talented guys.