Mismatch blow off-The Who opening for Herman's Hermits, '68 or '69 memory fades. More recently, that is within the last 15 years; unknown Keb Mo' solo opening for bored and boring JJ Cale, the crowd called out for Mo' and got him to come back out when Cale limped off.
'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.