 On Ecstasy 's supporting tour My Bloody Valentine conceived the idea of " the holocaust " , an interlude of noise and excessive feedback during live performances which was later attributed to their song " You Made Me Realise " and often exceeded 130 decibels . The band toured small student venues and , according to Kevin Shields , at " one particular place , there were these guy playing pool in the background , shouting amongst themselves and being quite loud and not paying attention " . Before performing " Clair " , Shields said to the band " let 's just do it until those guys stop " and performed a two @-@ chord riff in the song that lasted for an approximate 30 minutes . 
