I’m of course talking about Alfred Hitchcock’s Psycho.
This movie is a generational chiller. My mother saw it in the theater when my father was off doing his national guard service, and had to go home to her mother because she couldn’t stand sleeping alone. I saw it on TV, and tried to take my shower without closing the curtain for weeks. My husband can do a killer impersonation of Anthony Perkins smile in the very last scene. I have forbidden him to use this particular talent when I’m in the room.