screams at the top of their lungs no matter what the situation . 
(ROOT (S (VP (VBZ screams) (PP (IN at) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (PRP$ their) (NNS lungs))))) (ADVP (RB no) (RB matter) (SBAR (WHNP (WP what)) (FRAG (NP (DT the) (NN situation)))))) (. .)))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (NNS ))))) (ADVP (RB ) (RB ) (SBAR (WHNP (WP )) (FRAG (NP (DT ) (NN )))))) (. )))