a cinematic disaster so inadvertently sidesplitting it 
(ROOT (NP (NP (DT a) (JJ cinematic) (NN disaster)) (VP (ADVP (RB so) (RB inadvertently)) (VBG sidesplitting) (NP (PRP it)))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (VP (ADVP (RB ) (RB )) (VBG ) (NP (PRP )))))