Rockstar Mayhem 2008-Mastodon-Colony Of BirchmenAt Glen Helen Pavilion, July 13, 2008 13, 2008, 36, Airbourne, At, Birchmen, Black, Chord, Colony, Crazyfists, Death, Disturbed, DragonForce, Emofags, Finger, Five, Glen, Head, Helen, Hot, HxC, Jericho, July, Jägermeister, Machine, Mastodon, Mayhem, Metal, of, Pavilion, Punch, Red, Rockstar, Silence, Slipknot, Stage, Suicide, The, Tide, Topic, Underoath, Walls