It mutter back get low like muscle ?
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (ATVP_1 (VBP_0 mutter) (RB_1 back)) (VP_1 (VB_0 get) (ADJP_0 (JJ_1 low) (PP_1 (IN_1 like) (NP_2 (NN_3 muscle))))))) (DOT_0 ?)))