▁drove ▁a ▁bul ld oz er ▁through ▁the ▁ven ue ▁at ▁the ▁back ▁of ▁the ▁stage . ▁There ▁were ▁also ▁reports ▁of ▁audience ▁members ▁being ▁required ▁to ▁fill ▁out ▁wa ivers ▁before ▁shows ▁to ▁prevent ▁the ▁band ▁or ▁the ▁ven ue ▁being ▁su ed ▁in ▁case ▁of ▁any ▁potential ▁danger ▁caused ▁to ▁them . ▁ ▁Other ▁pieces ▁involve ▁more ▁symbol ic ▁forms ▁of ▁" d anger ", ▁such ▁as ▁Nam ▁June ▁Pa ik ' s ▁" D anger ▁Music ▁for ▁Dick ▁H igg ins ," ▁which ▁direct s ▁the ▁perform er ▁to ▁" c ree p ▁into ▁the ▁v ag ina ▁of ▁a ▁living ▁wh ale ", ▁ ▁or ▁a ▁piece ▁may ▁direct ▁that ▁the ▁volume ▁of ▁the ▁music ▁stead ily ▁increases ▁causing ▁the ▁audience ▁to ▁fear ▁that ▁it ▁will ▁make ▁them ▁def ec ate ▁( the ▁hypoth et ical ▁" b rown ▁note "), ▁although ▁it ▁might ▁never ▁reach ▁that ▁point . ▁ ▁See ▁also ▁Son ic ▁weapon ▁ 2 0 th - century ▁classical ▁music ▁Contempor ary ▁music ▁Ex perimental ▁music ▁No ise ▁music ▁Chris ▁Bur den ▁ ▁References ▁ ▁Further ▁reading ▁C ope , ▁David ▁Te chni ques ▁of ▁the ▁Contempor ary ▁Compos er ▁() ▁Fried man , ▁Ken ▁The ▁Fl ux us ▁Re ader ▁() ▁H igg ins , ▁Hann ah ▁Fl ux us ▁Exper ience ▁() ▁N yman , ▁Michael ▁Ex perimental ▁Music : ▁ ▁C age ▁and ▁Bey ond ▁() ▁ ▁External ▁links ▁ ▁Dick ▁H igg ins ▁D anger ▁Music ▁Number ▁Se vent een ▁from ▁Tell