that never really busts out of its comfy little cell 
(ROOT (S (NP (DT that)) (ADVP (RB never)) (ADVP (RB really)) (VP (VBZ busts) (PP (IN out) (PP (IN of) (NP (PRP$ its) (JJ comfy) (JJ little) (NN cell)))))))
(ROOT (S (NP (DT )) (ADVP (RB )) (ADVP (RB )) (VP (VBZ ) (PP (IN ) (PP (IN ) (NP (PRP$ ) (JJ ) (JJ ) (NN )))))))