Psycho (1960 film)
Shower scene

It is often claimed that, despite its graphic nature, the shower scene never once shows a knife puncturing flesh. However, a frame by frame analysis of the sequence shows one shot in which the knife appears to penetrate Leigh's abdomen, an effect created through lighting and reverse motion. Leigh herself was so affected by this scene when she saw it that she no longer took showers unless she absolutely had to; she would lock all the doors and windows and would leave the bathroom and shower door open. She never realized until she first watched the film "how vulnerable and defenseless one is".
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