Definitely worth watching

One scene that I often think about is where Robertson's detective puts Grey's psychic abilities to the test. Grey is supposed to pick out which sealed envelopes contain the <something I can't remember... like, the papers with the Xs on them>. He fails, getting every one wrong. Robertson assumes that that's that... until the statistician points out the if Grey was a fake he would have found ~12%-13% by pure chance. But getting them all wrong is highly significant, statistically. It's twists like this that capture the suspenseful ambiguity of the whole movie.