gives us episodic choppiness , undermining the story 's emotional thrust . 
(ROOT (S (VP (VBZ gives) (NP (PRP us)) (NP (JJ episodic) (NN choppiness)) (, ,) (S (VP (VBG undermining) (NP (NP (DT the) (NN story) (POS 's)) (JJ emotional) (NN thrust))))) (. .)))
(ROOT (S (VP (VBZ ) (NP (PRP )) (NP (JJ ) (NN )) (, ) (S (VP (VBG ) (NP (NP (DT ) (NN ) (POS )) (JJ ) (NN ))))) (. )))