This article is from the Movie Trivia, by Murray Chapman muzzle@cs.uq.oz.au with numerous contributions by others.
- DIRCAMEO(Alfred Hitchcock): about 40 minutes in, coming out of the
elevator at the Empire hotel carrying a violin.
- One of the first Hollywood films to deal with psychoanalysis.
- The dream sequence was designed by 'Salvador Dali' (qv), and was originally
supposed to run for 20 minutes. It included a scene with Dr. Peterson
covered in ants. Only part of it was filmed, and even less of it ended up in
the release version.
- The shot where the audience sees the killer's view down a gun barrel
pointing at Peterson was filmed using a giant hand holding a giant
gun to get the perspective correct.
- The snow valling on John Ballentine and Dr. Peterson during the skiing
scene was actually cornflakes.
 
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