Look at this.
( ( Look ( at this ) ) . )
(ROOT (S (VP (VB Look) (PP (IN at) (NP (DT this)))) (. .)))
Take a gander at this, it's incredible.
( ( ( Take ( a gander ) ) ( at this ) ) ( , ( it ( ( 's incredible ) . ) ) ) )
(ROOT (S (S (VP (VB Take) (NP (DT a) (NN gander)) (PP (IN at) (NP (DT this))))) (, ,) (NP (PRP it)) (VP (VBZ 's) (ADJP (JJ incredible))) (. .)))