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Continuity mistake: During the final fight between Optimus and Sentinel, a long curved copper pipe going from Sentinel Prime's chest to his right arm disappears and reappears between shots. And it isn't torn of in the fight between only the Prime's, I cannot say if Megatron doesn't remove it later on.

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Trivia: There is a sound effect which is used twice. It's first used in Revenge of the fallen when Optimus breaks Megatrons arm and shoots him with it. Megatron makes a growling noise during the slo-mo shot of parts falling off his face, after that optimus blasts him through the ancient building. It's then used in Dark if the moon during the shot Just after Sentinel is floored by a rocket from a soldier, he runs away on all fours and transforms into his alt mode and is then tackled by Optimus. During Sentinel's transformation the growling sound effect is used again.

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Revealing mistake: When Megatron blasts the Lincoln statue and sits in his throne there is a CG mistake. His left foot is embedded in the stonework with one of the wheels (only 3/4 is visible).

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