This reminds me of a Van Halen concert we went to...The opener was Little Angels or so (not very sure any more about the name). They were soooo boring...the singer tried to get attention by giving a loud "hey!" in between songs. As it was pretty quiet my friend yelled a very loud "hey!" back. The vocalist put up is hand to him and immediatly my friend pointed at his watch and waved him to get off stage...Not a real nice thing to do, but it was funny as hell, all the people who saw it (a lot!) had a good laugh ...