Continuity mistake: On the plane ride to New Orleans, Dylan tells Alma the Horsemen were a bunch of street magicians a year previously. As the shot ends, Alma has her head turned 90 degrees facing Dylan. Yet in the side angle, her head begins to turn that position. (00:41:10)
Continuity mistake: When Merritt begins his first magic trick, he puts a woman in "sleep" and places her head on his shoulder. In the first shot, her head is turned 90 degrees to the left. But in the next shot from a distance, her head is on his shoulder but isn't turned an inch. Her head goes to being turned 90 degrees once again in the next shot. Then back to not being turned when he lets go of her. (00:02:10)
Continuity mistake: At the Las Vegas show, Daniel says to the French banker "If you could sign your name. In English if possible." The next shot shows Henley walking around the stage in the center. But by the next shot she's suddenly standing at the edge of the stage. (00:19:35)
Other mistake: When the Horsemen remove $70,000 from Tressler's cheque, audience member Josepha is waving her flashlight on her paper, and begins to notice something. However, it is not until the next shot where it is shown that the 70 has appeared in front of her $562 written on her paper. (01:00:50)
Continuity mistake: When the French banker is called onto the stage, Daniel points out that they wouldn't be there for Arthur Tressler. As he says this, Henley is visible to the left of screen with her hands by her side. Yet from the next shot, her right arm is suddenly raised pointing at Arthur. (00:17:50)
Continuity mistake: Just as Alma finishes asking Dylan if he thinks there is a fifth Horseman, her lips are still a centimetre open, but in the next shot, her mouth is suddenly sealed. (00:47:00)
Character mistake: The caption under Shrike's picture in the newspaper that Alma is reading, referring to the circumstances of Shrike's accidental death in a locked safe trick, reads 'Police say famed magician Lionel Shrike vigorously attempting to free himself to no avail.' It should be 'attempted', given he tried and failed, then died, so is unlikely to give it a second go.
Continuity mistake: In Merritt's first scene, he walks over to a man and reads his mind. Just as the man says "Look, it was a business trip", he is looking at Merritt. But in the next shot, he's suddenly looking at his wife. (00:02:40)
Answer: The mirror was inserted at an angle, so that the reflection was the ceiling and not what was in front of them. It's the same principle for how periscopes work.
Bishop73