exploits ( headbanger ) stereotypes in good fun , while adding a bit of heart and unsettling subject matter . 
(ROOT (S (VP (VBZ exploits) (-LRB- -LRB-) (NP (NN headbanger)) (-RRB- -RRB-) (NP (NNS stereotypes)) (PP (IN in) (NP (JJ good) (NN fun))) (, ,) (SBAR (IN while) (S (VP (VBG adding) (NP (NP (NP (DT a) (NN bit)) (PP (IN of) (NP (NN heart)))) (CC and) (NP (JJ unsettling) (NN subject) (NN matter))))))) (. .)))
(ROOT (S (VP (VBZ ) (-LRB- ) (NP (NN )) (-RRB- ) (NP (NNS )) (PP (IN ) (NP (JJ ) (NN ))) (, ) (SBAR (IN ) (S (VP (VBG ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))) (CC ) (NP (JJ ) (NN ) (NN ))))))) (. )))