1.) Hearing Roger Waters say, "This one was written when I was the young, fuc*ed up, Roger of Pink Floyd," during The Wall tour a few years back.
2.) Watching Neil Young kick in the bass drum after he introduced "Down By The River" as, "A song I wrote one night when I let the dark side take control" during the "Old Ways" tour (which was all country songs, except for that one moment)
3.) Watching Rickie Lee Jones' band jump off stage and rock the crowd up and down the aisles at Shea's after the singer stumbled off-stage drunk, Jack daniel's bottle in hand, and didn't return for 45 full-minutes.