there 's undeniable enjoyment to be had from films crammed with movie references , but the fun wears thin -- then out -- when there 's nothing else happening 
(ROOT (S (S (NP (EX there)) (VP (VBZ 's) (NP (NP (JJ undeniable) (NN enjoyment)) (SBAR (S (VP (TO to) (VP (VB be) (VP (VBN had) (PP (IN from) (NP (NP (NNS films)) (VP (VBN crammed) (PP (IN with) (NP (NN movie) (NNS references)))))))))))))) (, ,) (CC but) (S (NP (DT the) (NN fun)) (VP (VBZ wears) (ADJP (JJ thin)) (, --) (ADVP (RB then) (RP out)) (, --) (SBAR (WHADVP (WRB when)) (S (NP (EX there)) (VP (VBZ 's) (NP (NP (NP (NN nothing)) (JJ else)) (VP (VBG happening))))))))))
(ROOT (S (S (NP (EX )) (VP (VBZ ) (NP (NP (JJ ) (NN )) (SBAR (S (VP (TO ) (VP (VB ) (VP (VBN ) (PP (IN ) (NP (NP (NNS )) (VP (VBN ) (PP (IN ) (NP (NN ) (NNS )))))))))))))) (, ) (CC ) (S (NP (DT ) (NN )) (VP (VBZ ) (ADJP (JJ )) (, ) (ADVP (RB ) (RP )) (, ) (SBAR (WHADVP (WRB )) (S (NP (EX )) (VP (VBZ ) (NP (NP (NP (NN )) (JJ )) (VP (VBG ))))))))))