Actress Janet Leigh ...

...was pretending to learn her lines on the toilet for "Psycho". Talking about the photograph, she said: "I did present Hitch with a surprise of my own, however. Because of the toilet's importance, I schemed with the prop man to put a regular potty in my dressing room, and then the still man took a picture of me sitting on the john reading the script. Hitch got a good chuckle from that."

1st toilet flash on screen

Hitchcock`s Psycho was the first American film ever to show a toilet flushing on screen.