Hitchcock compiled the shower sequence in 70-odd takes of two and three seconds each, for which Leigh spent seven days in the shower. Rumors circulated that she was nude, but she wore a flesh-colored moleskin.
Although tame by today's standards, the scene was shocking for the time for its brutality.
Leigh wrote in her 1995 book ''Psycho: Behind the Scenes in the Classic Thriller'' that the filming was easy until the last 20 seconds when she had to express total horror as her character was being slashed to death.
She often said she hadn't been able to take a shower since the movie. ''It's not a hype, not something I thought would be good for publicity,'' she insisted. ''Honest to gosh, it's true.'' I had my own scares of taking showers after that movie myself.