Endorphins were flowing.
( Endorphins ( ( were flowing ) . ) )
(ROOT (S (NP (NNS Endorphins)) (VP (VBD were) (VP (VBG flowing))) (. .)))
I was very calm and collected.
( I ( ( ( ( was ( very calm ) ) and ) collected ) . ) )
(ROOT (S (NP (PRP I)) (VP (VP (VBD was) (ADJP (RB very) (JJ calm))) (CC and) (VP (VBD collected))) (. .)))