Not saying they blew him off the stage, but I saw the Feelies open for Lou Reed and they were so good I copped seats at the next show a couple days later and drove a hundred miles to catch it again. Just to see them.
'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.