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The Great Dictator mistake picture

Revealing mistake: When the gun turret is about to fire its second projectile, two support wires can be seen holding the barrel in place.

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Revealing mistake: When the defective shell is about to fall, the ground shows no sand mounds. A couple of shots later, when the soldiers gather around it, a circular platform used to move the shell is visible, and a sand mound has inexplicably appeared nearby-apparently to conceal, albeit unsuccessfully, the mechanism that makes the shell rotate.

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