He motioned to me as if they were going to cut off his head.
( He ( ( ( motioned ( to me ) ) ( as ( if ( they ( were ( going ( to ( ( cut off ) ( his head ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD motioned) (PP (TO to) (NP (PRP me))) (SBAR (RB as) (IN if) (S (NP (PRP they)) (VP (VBD were) (VP (VBG going) (S (VP (TO to) (VP (VB cut) (PRT (RP off)) (NP (PRP$ his) (NN head)))))))))) (. .)))
He made a rude gesture at me with one of his fingers.
( He ( ( ( ( made ( a ( rude gesture ) ) ) ( at me ) ) ( with ( one ( of ( his fingers ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD made) (NP (DT a) (JJ rude) (NN gesture)) (PP (IN at) (NP (PRP me))) (PP (IN with) (NP (NP (CD one)) (PP (IN of) (NP (PRP$ his) (NNS fingers)))))) (. .)))