You and your band's intro at the start of your Live at Wembley show...you've just gone onto the dark stage, the crowd is restless and the rest of the band is waiting for your signal. You take a deep breath and nod at the drummer. The crowd roars as the first notes are played. One minute of awesome spectacle as the stage comes to life under blinding flashes of lasers and smoke. You can almost lean back and rest against the wall of sound coming from your amps behind you.