Continuity mistake: At the bank where the elder Mr. Dawes appears from the back room, he makes it as far as the edge of the step in that shot. In the next shot, he's back by the door walking again to the edge of the step.
Mary Poppins (1964)
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Directed by: Robert Stevenson
Starring: Julie Andrews, Dick Van Dyke, David Tomlinson, Glynis Johns
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George Banks: Kindly do not attempt to cloud the issue with facts.
Trivia: This was Julie Andrews' film debut. Her role won her an Academy Award for Best Actress.
Question: Does anybody know how they did the scene where Mary Poppins is doing a duet with her mirror image?
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Chosen answer: They recorded her singing in two separate parts and fixed them together. The editors did a good job on it! It may have been made a long time ago but even then the technology was quite advanced enough to carry out that scene.