When most people think of Psycho they think of the shower scene. Admittedly it is one of the all scariest scenes in the history of movies. Today I recently re-watched Psycho and I'm convinced there is an even subtler, creepier scene proceeding it.
When Norman brings Marion the sandwich and milk (~35 minutes into the movie), you see him, his reflection in the window and his shadow on the wall. She invites him to come in but he takes a step back. He moves back, his reflection movies back, but his shadow stays in place lurching over her for a split second before moving back. It is extremely unsettling, the symbolism is crystal clear.
I'm convinced this must have been an intentional special effect by Hitchcock. But I've been searching on the internet for a while can't find any mention of it. Has no one previously noticed this awesomely creepy effect?