I think I've seen Green Day live about five or six times over the years. Always a great time. One of my favorite moments at any Green Day show is when they bust out this Operation Ivy cover. Early on, Billy Joe would give up his guitar to a member of the crowd to play (as seen in this video). As the years went by, the entire band started handing over their instruments to members of the crowd to play. Somehow it always seems to work out.