Fillmore East, the 70's, everybody's stoned on acid waiting for Emerson, Lake, & Palmer and out comes Edgar Winter's White Trash.......NO CONTEST!!!!!;)
'they blew'em off the stage'
what concerts have you attended, where the warm up act blew the headliners away.....my examples...brownville station upstaging zz top to the point where people where chanting 'brownsville station!' during the littl ol' band from texas' set.....another..t.rex upstaging lynyrd skynyrd(yes there really was such a show), and the grass roots upstaging cream.