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Did you Know? Psycho is the first U.S. movie to feature toilet flushing.
At a time when it was considered impolite to show a toilet being flushed on screen, Alfred Hitchcock saw an opportunity to add even more shock to his already shocking film by presenting a scrap of paper that proves to be an important clue, failing to flush in a toilet. The clue in the book was an earring discovered in the bathroom, but Hitchcock changed it to a piece of paper found in the toilet, partly to give viewers a surprise.