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Duck, You Sucker (1971) Poster

Goofs

Jump to: Anachronisms (5) | Continuity (3) | Revealing mistakes (4) | Spoilers (2)

Anachronisms 

A close-on shot of one of the convoy's trucks as it rolls through mud shows a modern pneumatic tire and wheel.
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Use of MG42s, a machine gun developed in Germany three decades after the Mexican revolution.
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In the train, the automatic pistol that Juan Miranda uses is a Browning GP35. As its names suggests, this model has become available in 1935 (so contemporary of the mentioned MG42).
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In the first scene where Juan holds up the Stage Coach, one of the children in the bandit gang is holding a Spanish double action pistol, an Astra 400. If this movie were to take place in 1914, the Astra 400 model would not have been invented yet, as it was put into production in 1921.
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Although the action takes place circa 1914, when Mallory's possessions are rifled by Miranda's family, a flag with the legend "IRA" is pulled out. The IRA was not formed until 1919.
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Continuity 

The dynamite Sean hands Juan before the bank raid is several sticks in a bundle, with a single fuse and cap in the center, but when Juan dynamites the vault door, he uses two single sticks, individually fused and capped.
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When the deserter is taken from the train to be executed along with two others the wall behind him is shot at and damaged on both sides of the deserter. The following close-up shot of the deserter getting shot in the back reveals no damage to the wall.
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When Sean sets his machine gun back on its tripod after setting the charges, it is loaded with a section of belt with no more than (possibly) fifty cartridges; he is never seen to reload it, but fires many more shots than that. Also, when he stops shooting, it is because the gun has run out of ammunition - we can clearly see the bitter end of the belt go through the action, leaving empty links hanging on the right side, and no belt at all on the left side. But in later shots there is a belt with unfired cartridges visible on that side - though it seems to change length between shots.
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Revealing mistakes 

When Juan is in the bank, after he lets some of the prisoners go, a soldier appears walking down the stairs in the background.
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In the train wreck sequence, some of the miniature shots of the explosion and the train being destroyed were not printed in proper anamorphic format, and are badly distorted.
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Juan's machine gun is not pointing at Gutierez as he shoots him.
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When Juan's youngest son is shown lying dead, the actor can be seen breathing.
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Spoilers 

The goof items below may give away important plot points.

Continuity 

John's second flashback to his killing of Nolan in the Irish pub contains footage that does not match up to the first time we see this scene. Nolan's head is positioned differently in both versions of the flashback (in the first, his head remains in the same position, while in the second it is tilted at first before moving back to a neutral position), while the shot of John pulling his concealed gun out is also different (the gun's barrel is positioned closer to the left of the screen in the first flashback, but closer to the center in the second).
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Revealing mistakes 

Depending on how the film's image is presented, an obvious dummy stand-in for Romolo Valli can be seen during the climactic train crash.
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See also

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

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