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Godzilla vs. Gigan (1972) Poster

Goofs

Audio/visual unsynchronised 

In many shots, Anguirus keeps roaring but he doesn't open his mouth.
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Character error 

In the English dub, in which the monsters infamously talk, Godzilla mispronounces Angilas' name as "Angila".
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Continuity 

Due to stock footage from earlier movies being used, the appearances of Godzilla, Ghidorah, and Anguirus keep changing.
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Due to stock footage from earlier movies being used, the sky often changes from day to night.
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When Godzilla is fighting Ghidorah next to the mountain, it is a stock shot from Ghidorah, the Three-Headed Monster. As Ghidorah knocks Godzilla into the bridge, the Mothra larva appears at Godzilla's feet, even though Mothra isn't in the film.
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After the Godzilla Tower is destroyed, the shot of Godzilla rising is from Invasion of Astro-Monster. When he gets up, Rodan is visible in the background, even though he never appears in the film, aside from a stock-footage shot used earlier in the film.
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Due to stock footage taken from various films, in some shots during Tokyo's destruction, the city background suddenly changes to a grassy area.
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All of the characters wear the same clothing throughout the film, even though it's supposed to be taking place over several days.
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Ghidorah's yellow beam is white in some shots.
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When circling above the Godzilla tower, King Ghidorah and Gigan appear much, much smaller than when they're on the ground.
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Ghidorah has glowing red eyes in the newly filmed flying shots (in which they used a small, immobile prop) and normal eyes in all other shots.
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The new flying King Ghidorah prop has much longer and larger hair than the suit used in the rest of the movie.
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The balloon used by the heroes to lift up the wire to the top of the tower has a slightly pointy tip because it's not inflated entirely, but when it cuts to the miniature model, the balloon is almost perfectly round.
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Crew or equipment visible 

When tanks are coming to stop Anguirus, a wire can be seen pulling the tanks forward.
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When Anguirus gets his face slashed by Gigan's buzzsaw, you can briefly but very clearly see a gloved hand pushing Anguirus' head towards Gigan by grabbing onto the spikes on the back of his head.
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Revealing mistakes 

It is painfully obvious that in the shots which show Gidorah and Gigan flying, they are stiff dummies. In scenes that take place on the ground, both move around quite a lot, and Gidorah is always seen swinging his three heads about, so the flying scenes stand out like a sore thumb.
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Pieces of Godzilla clearly keep falling off during some shots, indicating that the suit was already decaying during filming.
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The main human characters, when they descend to the ground on a cable, it is obvious that they are mere miniatures in reality. For one, they don't have the proportions of a human being, nor do their clothes look like the ones the actual humans were wearing.
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As Gigan steps on a car while ravaging across town, the front bumper and grill pop off the car, revealing that no engine is inside the plastic hood.
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When Gigan crawls behind some trees, it cuts to stock footage taken from the film The War of the Gargantuas, and you can clearly see that instead of Gigan, it shows one of the Gargantuas from that movie hiding behind the trees.
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The movie is infamous for featuring a decaying Godzilla suit, but the suit of Anguirus also shows signs of wear, most noticeably paint being scratched off his horns and claws.
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When the military attacks Anguirus and shines spotlights on him, the holes in his neck that the stuntman uses to see and breathe through are clearly visible.
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The attachments of Anguirus' backplate are visible in a number of shots.
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Due to see-through plastic being used for his eyelids, Anguirus' eyes are still visible when he closes them.
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Spoilers

The goof item below may give away important plot points.

Revealing mistakes 

When the alien bad guys die among the flames, the footage of the fire composited into the scene always remains in the same place in spite of the changing shots and camera angles. This also means that in some of the shots, the fire is clearly "rising" downwards.
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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