Trivia: For the last murder scene, when Norman brains his mother with a shovel in the kitchen (the only murder Norman actually commits in the entire film), his mother turns into a life-size dummy just before the fatal blow. You notice that she inexplicably leans far forward and bows her head (to hide her face for the dummy transition) just before Norman hammers her. This scene took several days to shoot, to get the transition just perfect, and it is the best practical special effect in the movie.Charles Austin Miller
Mary: You really wanna know what Norman's like?
Warren Toomey: Yeah.
Mary: Better than you'll ever be, fat boy.