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Revealing mistake: When Peyton is making Paulie's mask, note the burnt right hand typing on the keyboard. It moves like a stop-motion object, revealing it's either a robotic hand or an animated effect.

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Continuity mistake: After Peyton stops holding Louis' leg, he opens his hand and there is no visible damage despite having just had a huge nail pinned through it.

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Continuity mistake: Peyton lets Louis fall, who dives head first. A shot later he flies horizontally.

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Continuity mistake: When Peyton's hand gets pinned to the beam, it keeps changing positions in every shot.

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Continuity mistake: While standing on the beam, Louis cries "I built it all!", and the gun in his right hand appears and disappears between shots.

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Continuity mistake: When Louis takes Robert's mask out and reveals Peyton's burnt face, Peyton takes his left hand to his cheek. When the angle changes, his hand is lowered and he repeats the movement. In the following shots the position of his hand is inconsistent all the time.

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Continuity mistake: During the helicopter scene, when Peyton is hanging onto the cable, in the close-ups he's simply grabbing it, but in the wide shots the cable is strapped around his body.

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Revealing mistake: When Paulie is thrown out of the window he is replaced by an obvious stuntman: His bald cap is way lighter than his skin, as opposed to Paulie's whose skin colour is homogeneous.

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Continuity mistake: While on the helicopter, Peyton smacks a goon's face, who turns away and shows a streak of blood on his mouth. When the angle changes his head position has changed and is now facing Peyton.

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Revealing mistake: Right before Einstein is sent to the future, when a very bright light surrounds the DeLorean, not only is the dog gone, but a black bulky bag has appeared on the passenger's seat. Seemingly a hidden stunt driver or a driving mechanism. (00:21:56)

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Continuity mistake: When Marty arrives at 1955-Lyon Estates he removes his hood and his fringe is brushed from right to left. When the angle changes it has swapped sides.

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Continuity mistake: After the DeLorean disappears with the dog inside, flames appear underneath Marty and Doc. In the close-up of their legs, a shot later, the road is spotless and the flames reappear a second later.

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Continuity mistake: Right before Doc presses the remote control to send Einstein to the future, his left index and thumb fingers are on the remote. In the close-up it's just his thumb on it. In further close-ups it swaps to the index and thumb.

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Continuity mistake: Before Doc sends Einstein to the future and says "If my calculations are correct...", Marty raises his left arm. When the angle changes it's lowered.

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Continuity mistake: Judy comes back from work and throws her notepad and cell phone on the table. When the angle changes the notepad has vanished.

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Continuity mistake: When 1955-Marty reads Doc's 1885 letter next to the Western Union car, his right hand is either on the lower part of the paper or the upper, depending on the shot.

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Continuity mistake: When Doc travels to 1885, Marty stands on the road holding a rope and says "He's gone." When the angle changes, the length of the rope sticking out is much shorter. (01:38:03)

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Continuity mistake: When Buford hangs Marty, he puts the rope around his neck once. In the close-up the rope goes around twice.

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Continuity mistake: When Marty and Buford duel, Seamus' distance to the bartender keeps increasing / decreasing randomly between shots.

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Continuity mistake: When the train hits 70 mph the chimney explodes to pieces. When the bar that Clara holds onto breaks the chimney reappears. (01:39:53)

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