Revealing mistake: When Soliday becomes possessed and grabs the steering wheel of the car, you can see the small explosion effect that causes the car to flip.
Revealing mistake: When Artie demagnetizes the lab coat, Claudia falls from a high altitude, but when the shot cuts to her landing on the raft, you can see that the actor jumped from a position much closer to the ground. (00:39:00)
Revealing mistake: When MacPherson knocks Joshua off the platform, he falls on a bunch of pipes, but they are already bent before Joshua actually lands on them.