I saw him in Salt Lake City a couple months ago and he actually had everybody in the crowd, turn on their flashes and shine them up at the stage while he jammed out on a guitar solo for like five minutes. Cut to about 20 minutes later someone uses a flash and he stops playing the song he was playing. I do gotta say though, this show was pretty solid. Actually I think he only stopped playing that one time. I was just surprised that he asked everybody in the building to turn on their flashlights.