Visible crew/equipment: When Mark first meets the Winklevoss twins, just as they are about to leave, right after one of the twins says, "We row crew," Armie Hammer's face hasn't been added properly and you can see that it's a different actor. (00:22:10)
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Visible crew/equipment: In the scene when Secretariat is born, the young foal bumps into the camera while trying out his new legs.