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Continuity mistake: When the girls in the red jeep pull up to the mail boxes, Tessa gets out and says "almost time for a tan and get wasted." Another girl then gets out and throws one arm up in the air and cheers. From the front shot, you see that both her sleeves are still over her shoulders, and her hair is over her left arm, which is down. From behind and the sleeve on her left shoulder is down so her arm is showing, and her hair is now behind her back, with her pink bra strap visible. (00:07:10)

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Continuity mistake: Just after Lockdown stabs Optimus in the chest with his own sword, Cade runs closer and shoots at Lockdown. He then hides behind some bricks. In that shot, the bricks are a broken wall that is two separate pieces. Then it cuts to a different shot as Lockdown returns fire at Cade, and now the wall is one piece. A guy also suddenly appears in the shot next to the wall and right where the explosion happens where Lockdown shot the wall. Originally, this man was one of several extras portraying the silo factory workers wearing hard hats, who were running and hiding, but Michael Bay wanted this silo scene to be about just the main cast, so the scene was trimmed and the extras were cut, but this shot slipped through. Some footage can be seen on Blu-ray special features. (02:30:55)

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Continuity mistake: Lucas returns from getting parts for Optimus Prime, saying he went to the doctor. As he pulls up in his car and parks, his window is up. But then it shows him open his door and climbing out, and suddenly the window is halfway rolled down. (00:33:20)

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