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Continuity mistake: When the plane enters the greenhouse the cabin is empty. Then in the close-up Flash and Dale have appeared inside.

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Continuity mistake: When Ming walks in the room where Dale sleeps, her thigh swaps from covered to uncovered and the cushion moves around depending on the angle.

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Continuity mistake: After the meteorite on Munson's bed starts burning, his hand moves from down to up and is now holding a pen and paper, despite him being asleep. Also the cup on the table moves around between shots.

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Continuity mistake: When Flash greets the martians he's handed a gun which makes him crouch and twist to the left. When the angle changes he is now standing tall and his hand is at chest level instead of waist level.

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Revealing mistake: When Flash takes a beating after saving Dale, all the kicks he receives are very poorly performed, most of them never reaching his body.

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Plot hole: When the movie starts, Flash's t-shirt bears a lightning logo on the back, the same one that curiously appears on the clothes he's given later on when he gets to Mongo, where he wasn't expected at all.

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Continuity mistake: When Ming orders to send another charge against Sky City the sky swaps from sunny in the wide angles, to cloudy in the close-ups in barely half a second.

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Continuity mistake: When the laser scans Zarkov's jacket to destroy the gun inside, the arm disappears in the close-up angle.

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Continuity mistake: The FX of the rainbow coloured dangerous void is missing before the fight starts, revealing a grey coloured, harmless set. (01:09:45)

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Revealing mistake: When the spaceship flies, Zarkov keeps warning about the g-force and Dale and himself suffer it, yet when he tells Flash to step on a pedal, Flash manages to lift his foot and do everything effortlessly, g-force magically gone.

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Revealing mistake: Flash flies on the Cosmo-mobile and half of it becomes transparent due to the blue screen behind.

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Plot hole: A group of baddies in Ming City fire at Flash Gordon from one laser gun while he drives his jet, but from the opposite angle the shots come from everywhere, as if there were dozens of guns.

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Continuity mistake: Ming kicks a silver cup into the void. When it falls, the cup becomes green coloured.

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Plot hole: Flash needs a device to communicate via telepathy and help on how to use it, yet Dale talks out loud and her voice reaches Flash without the use of any device or help at all.

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Continuity mistake: When lizard man is fried, the position of his tail keeps changing between angles.

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Continuity mistake: After Barin stands up on the spiked ring his whip keeps changing positions depending on the angle.

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Continuity mistake: While fighting against Barin, Flash's whip lies on the floor and keeps changing from rolled to straight between shots.

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Continuity mistake: When Zarkov is waving a piece of cloth to signal Ming their position, Flash and Barin are standing behind, but disappear when Ming watches Zarkov on his screen, and reappear afterwards.

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Continuity mistake: After Barin saves Flash from the Arborian beast Flash's shirt is clean, a frame later from a different angle it's covered in mud.

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Continuity mistake: When Aura is kissing Flash and telling him about her palace, she has her arms around his ears. When the angle changes the hands are around his cheeks.

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