The friends could jerked actions , his fingers , .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 The) (NNS_0 friends)) (VP_4 (MD_0 could) (VP_1 (VBN_0 jerked) (NP_1 (ATNP_2 (ATNP_0 (NP_4 (NNS_1 actions)) (COMMA_0 ,)) (NP_3 (PRPDOLLAR_0 his) (NNS_0 fingers))) (COMMA_0 ,))))) (DOT_0 .)))