on September 16 1971 Opeth was in Denver for Gigantour 06'. They only played three songs ghosts of perdition, windowpane and deliverance. All of which are great songs but should have been joined by more Opeth songs. Lamb of god had a much longer set not to mention Dave 'look at my hair' Mustaine and Megadeth. I am convinced that one of the two headliners if not both were behind this shit.