▁f esto oned ▁with ▁w ires ▁and ▁neck laces ▁str ung ▁with ▁teeth , ▁Vel oso ▁prov oked ▁the ▁students ▁with ▁his ▁sens ual ▁movements ▁and ▁start ling ▁new ▁psych ed el ic ▁music . ▁He ▁was ▁bomb arded ▁by ▁ins ult s , ▁je ers ▁and ▁bo os ▁from ▁the ▁students , ▁who ▁became ▁even ▁more ▁inc ensed ▁when ▁American ▁pop ▁singer ▁John ▁D and ur and ▁made ▁a ▁surprise ▁appearance ▁during ▁the ▁song . ▁The ▁ide ological ▁conflict ▁clim ax ed ▁three ▁days ▁later ▁when ▁Vel oso ▁returned ▁for ▁the ▁second ▁round ▁of ▁the ▁competition ▁on ▁ 1 5 ▁September , ▁at ▁which ▁he ▁performed ▁a ▁new ▁song ▁entitled ▁" Pro hib ido ▁a ▁Pro hib ir " ▁(" It ▁is ▁For b idden ▁to ▁For bid "), ▁which ▁was ▁recorded ▁live ▁and ▁later ▁released ▁as ▁single . ▁ ▁The ▁students ▁began ▁his sing ▁and ▁bo o ing ▁as ▁soon ▁as ▁Vel oso ' s ▁name ▁was ▁announced , ▁and ▁when ▁he ▁began ▁his ▁performance , ▁his ▁over t ly ▁sexual ▁stage ▁moves ▁and ▁the ▁experimental ▁music ▁of ▁Os ▁Mut antes ▁prov oked ▁an ▁out p our ing ▁of ▁anger ▁- ▁the ▁audience ▁began ▁bo o ing ▁so ▁loud ly ▁stood ▁that ▁Vel oso ▁could ▁bare ly ▁be ▁heard , ▁and ▁a ▁large ▁number ▁then ▁stood ▁and ▁turned ▁their ▁back s ▁on ▁the ▁perform ers , ▁prompt ing ▁Os ▁Mut antes ▁to ▁turn ▁their ▁back s ▁on ▁the ▁audience . ▁As ▁the ▁song ▁continued , ▁the ▁students ▁p elt ed ▁the