"He and music legend [Emmylou Harris](http://en.wikipedia.org/wiki...) were performing a single-acoustic-guitar duet song dedicated to a mutual friend who had just died. A drunk person (very cleverly) yelled "Summer of '69!!! WOO!" during their harmonizing. Ryan Adams jumped off stage, punched the guy in the face, and refunded him the ticket cost from cash in his pocket. Yeah, what a *princess*." - ben