▁dow nt own ▁Mil w au kee , ▁she ▁plays ▁demol ition ▁der by ▁with ▁her ▁strat oc ru iser ▁and ▁does ▁away ▁with ▁Rick ▁once ▁and ▁for ▁all . ▁ ▁In ▁the ▁ch illing ▁clim ax ▁high ▁at op ▁the ▁Wisconsin ▁Gas ▁Company ▁Building , ▁Mary ▁and ▁Charlie ▁battle ▁it ▁out ▁with ▁Z omb ina ▁(" Bre aking ▁the ▁Sound ▁Bar rier "), ▁p itting ▁their ▁br ash ▁bel ting ▁voices ▁against ▁Z omb ina ' s ▁color atura ▁qu a vers . ▁All ▁appears ▁lost ▁until ▁good ▁old ▁Billy ▁arriv es ▁and ▁joins ▁forces ▁with ▁the ▁girls ▁by ▁adding ▁his ▁Ge iger - counter ▁tap - dan cing ▁to ▁their ▁ra uc ous ▁round el ay , ▁resulting ▁in ▁the ▁hide ous ▁dem ise ▁of ▁Z omb ina ▁whose ▁formerly ▁form id able ▁voice ▁dro ps ▁a ▁couple ▁oct aves ▁( She ▁bew ails : ▁" What ▁a ▁world ! ▁I ' m ▁bel ting ! ") ▁Mal one ▁and ▁Tr ent on ▁are ▁de - z omb ified , ▁and ▁Mil w au kee ▁– ▁( what ' s ▁left ▁of ▁it ) ▁– ▁is ▁saved ! ▁St al wart ▁Major ▁Mal one ▁leads ▁the ▁surv iv ors ▁in ▁a ▁stir ring ▁h ymn ▁of ▁patri otic ▁par ano ia , ▁advis ing ▁everyone , ▁everywhere ▁to ▁" Ke ep ▁Watch ing ▁the ▁Sk ies ". ▁ ▁Crit ical ▁reception ▁ ▁" D ead ▁aim , ▁dead pan , ▁dead - on ▁new ▁musical ! ▁With ▁keen - ey ed