Um, but he'd bend down and stay down to help that dog.
( Um ( , ( but ( ( he ( 'd ( ( ( bend down ) and ) ( ( stay down ) ( to ( help ( that dog ) ) ) ) ) ) ) . ) ) ) )
(ROOT (FRAG (NP (NNP Um)) (, ,) (CC but) (S (NP (PRP he)) (VP (MD 'd) (VP (VP (VB bend) (PRT (RP down))) (CC and) (VP (VB stay) (PRT (RP down)) (S (VP (TO to) (VP (VB help) (NP (DT that) (NN dog))))))))) (. .)))
Bending down, he realized the dog was fine.
( ( Bending down ) ( , ( he ( ( realized ( ( the dog ) ( was fine ) ) ) . ) ) ) )
(ROOT (S (S (VP (VBG Bending) (PRT (RP down)))) (, ,) (NP (PRP he)) (VP (VBD realized) (SBAR (S (NP (DT the) (NN dog)) (VP (VBD was) (ADJP (JJ fine)))))) (. .)))