it 'll keep you wide awake and ... very tense . 
(ROOT (S (NP (PRP it)) (VP (MD 'll) (VP (VB keep) (NP (PRP you)) (S (ADJP (ADJP (RB wide) (JJ awake)) (CC and) (, ...) (ADJP (RB very) (JJ tense)))))) (. .)))
(ROOT (S (NP (PRP )) (VP (MD ) (VP (VB ) (NP (PRP )) (S (ADJP (ADJP (RB ) (JJ )) (CC ) (, ) (ADJP (RB ) (JJ )))))) (. )))