little too much maybe
( ( little ( too much ) ) maybe )
(ROOT (FRAG (ADVP (RB little) (RB too) (RB much)) (RB maybe)))
Possibly a bit excessive, but let's ask my mom what she thinks. 
( Possibly ( ( a bit ) ( ( ( ( excessive , ) but ) ( let ( 's ( ( ask ( my mom ) ) ( what ( she thinks ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Possibly)) (NP (DT a) (NN bit)) (VP (VP (VBZ excessive)) (, ,) (CC but) (VP (VBD let) (S (NP (POS 's)) (VP (VB ask) (NP (PRP$ my) (NN mom)) (SBAR (WHNP (WP what)) (S (NP (PRP she)) (VP (VBZ thinks)))))))) (. .)))