Thus,  Step down (or back) and give me a shot  was readily understood.
( Thus ( , ( ( ( ( ( Step down ) ( -LRB- ( or ( back -RRB- ) ) ) ) and ) ( ( give me ) ( ( a shot ) ( was ( readily understood ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (VP (VP (VB Step) (ADVP (RB down)) (PRN (-LRB- -LRB-) (CC or) (VP (VBP back)) (-RRB- -RRB-))) (CC and) (VP (VB give) (NP (PRP me)) (NP (NP (DT a) (NN shot)) (SBAR (S (VP (VBD was) (VP (ADVP (RB readily)) (VBN understood)))))))) (. .)))
Therefore, statements referring to giving me a shot were comprehended.
( Therefore ( , ( ( statements ( referring ( to ( ( giving me ) ( a shot ) ) ) ) ) ( ( were comprehended ) . ) ) ) )
(ROOT (S (ADVP (RB Therefore)) (, ,) (NP (NP (NNS statements)) (VP (VBG referring) (PP (TO to) (S (VP (VBG giving) (NP (PRP me)) (NP (DT a) (NN shot))))))) (VP (VBD were) (VP (VBN comprehended))) (. .)))