busts out of its comfy little cell 
(ROOT (NP (NP (NNS busts)) (PP (IN out) (PP (IN of) (NP (PRP$ its) (JJ comfy) (JJ little) (NN cell))))))
(ROOT (NP (NP (NNS )) (PP (IN ) (PP (IN ) (NP (PRP$ ) (JJ ) (JJ ) (NN ))))))