bang-bang , shoot-em-up scene 
(ROOT (S (S (VP (NN bang) (HYPH -) (NN bang))) (, ,) (NP (NML (S (VP (VB shoot) (HYPH -) (NP (PRP em) (HYPH -) (RP up))))) (NN scene))))
(ROOT (S (S (VP (NN ) (HYPH ) (NN ))) (, ) (NP (NML (S (VP (VB ) (HYPH ) (NP (PRP ) (HYPH ) (RP ))))) (NN ))))