- r ated ▁movie ▁of ▁all ▁time , ▁d eth ron ing ▁Dead po ols ▁$ 4 6   mill ion , ▁while ▁nearly ▁e cli ps ing ▁Par an ormal ▁Activity ▁ 3 s ▁entire ▁week end ▁gross ▁of ▁$ 5 2 . 6   mill ion , ▁which ▁was ▁the ▁highest ▁opening ▁week end ▁gross ▁for ▁an ▁R - r ated ▁horror ▁film . ▁Mus chi etti ' s ▁It ▁went ▁on ▁to ▁open ▁to ▁$ 1 2 4   mill ion , ▁setting ▁the ▁records ▁for ▁largest ▁opening ▁week end ▁for ▁both ▁a ▁September ▁and ▁a ▁fall ▁release ▁( best ing ▁Hotel ▁Trans ylvan ia ▁ 2 s ▁( 2 0 1 5 ) ▁$ 4 8 . 4   mill ion ) ▁and ▁( best ing ▁Gra vity s ▁( 2 0 1 3 ) ▁$ 5 5   mill ion ), ▁while ▁e cli ps ing ▁the ▁biggest ▁adjust ed ▁September ▁opening ▁( best ing ▁R ush ▁H ours ▁( 1 9 9 8 ) ▁$ 6 2   mill ion ) ▁and ▁the ▁biggest ▁adjust ed ▁October ▁opening ▁( best ing ▁Sc ary ▁Movie ▁ 3 s ▁( 2 0 0 3 ) ▁$ 7 1   mill ion ). ▁ ▁Other ▁records ▁set ▁by ▁the ▁film ▁include ▁the ▁largest ▁opening ▁week end ▁for ▁an ▁R - r ated ▁horror ▁film ▁( best ing ▁Par an ormal ▁Activity ▁ 3 s ▁( 2 0 1 1 ) ▁$ 5 2 . 6   mill ion ), ▁the