surprising highs , sorrowful lows and hidden impulsive niches ... 
(ROOT (NP (NP (JJ surprising) (NNS highs)) (, ,) (NP (JJ sorrowful) (NNS lows)) (CC and) (NP (VBN hidden) (JJ impulsive) (NNS niches)) (. ...)))
(ROOT (NP (NP (JJ ) (NNS )) (, ) (NP (JJ ) (NNS )) (CC ) (NP (VBN ) (JJ ) (NNS )) (. )))