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Continuity mistake: When Kurt Russsell first goes to the crazy guys' shack, he puts a bottle down with the label facing forward. When he leaves it is facing the other way.

Fireball

Continuity mistake: When the Doc and Kurt Russel enter the burnt Norweigan building the door closes itself behind the Doc. It closes and opens several times over the course of the scene.

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Continuity mistake: When the three men are shown finding the UFO from the front, their hoods are down. In the next scene, from behind, their hoods are over their heads.

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Continuity mistake: When Kurt Russell first looks at the chess game, amount of ice in his glass changes between shots.

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Visible crew/equipment: When we see the huge dog alien, right before Childs burns it, a crewemember controlling the puppet is seen on the center of the monster's head.

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