He let when he mumbled stepping boy in surfers but eggs .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (VBD_0 let) (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (PRP_1 he)) (VP_5 (VBD_2 mumbled) (S_2 (VP_0 (ATVP_4 (VBG_0 stepping) (NP_5 (NN_3 boy))) (PP_2 (IN_0 in) (NP_3 (ATNP_0 (NP_4 (NNS_1 surfers)) (CC_0 but)) (NNS_0 eggs)))))))))) (DOT_0 .)))