(S (S (NP (NP (BASENP (NN Video) (NN footage)) (PP (IN of) (BASENP (DT the) (NN incident)))) (PRN (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (VP (ADVP (RB now)) (VP (VBN emerged) (ADVP (RB online))))))) (COMMA ,))) (VP (VBZ displays) (S (BASENP (NNS witnesses)) (VP (VBN screaming) (SBAR (IN as) (S (BASENP (DT the) (NN rigging)) (VP (VBZ falls) (PRT (RP down))))))))) (PERIOD .))