It was like looking into a mirror, except infinitely more realistic.
( It ( ( was ( like ( looking ( into ( ( ( a mirror ) , ) ( except ( infinitely ( more realistic ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (PP (IN like) (S (VP (VBG looking) (PP (IN into) (NP (NP (DT a) (NN mirror)) (, ,) (SBAR (IN except) (S (ADJP (RB infinitely) (RBR more) (JJ realistic)))))))))) (. .)))
It was like looking into the toilet. 
( It ( ( was ( like ( looking ( into ( the toilet ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (PP (IN like) (S (VP (VBG looking) (PP (IN into) (NP (DT the) (NN toilet))))))) (. .)))