too clumsy in key moments ... to make a big splash . 
(ROOT (S (ADJP (RB too) (JJ clumsy)) (PP (IN in) (NP (JJ key) (NNS moments))) (, ...) (S (VP (TO to) (VP (VB make) (NP (DT a) (JJ big) (NN splash))))) (. .)))
(ROOT (S (ADJP (RB ) (JJ )) (PP (IN ) (NP (JJ ) (NNS ))) (, ) (S (VP (TO ) (VP (VB ) (NP (DT ) (JJ ) (NN ))))) (. )))