His heart rate elevated because he was getting ready to jump at her and attempt to kill her. This tipped her off which is why she reacted. He realized it was her just before he jumped at her which is why the piano starting playing, showing that he realized it was her.
Sorry divinedash, I disagree. The way I see it, he doesn't realize that she is Katie until after he sees her reaction to the piano playing. His heart is racing because "Evelyn" says she is leaving. Thus he thinks his plan is ruined, and he isn't going to get the money.
Dr. Lewis knew it was Katie not Evelyn, because she was playing a role, and the piano threw her out of character momentarily. She behaved like an actress who was forgetting her lines, Evelyn's reaction would have been different.
reply
share