The only thing I can think of is the end of the set? Jon was pissed on stage because he thought there were technical difficulties. However, it was Jon's guitar that actually blew up. Nobody could figure out wtf happened at the time, including his techs. They took it apart and it was blackened/charred on the inside. His tech told him he never seen that happen in his 20 years on the road. Once Jon was shown, he was incredulous and couldn't believe it either.
I'm not trying to change your mind. I just want you to know that Jon was one of the most gracious and coolest guys to ever attend the fest backstage.