Revealing mistake: When driving along the freeway, there is a reflection in the windscreen of some clouds. For about three minutes, this reflection does not move. If you're traveling at over 80mph as shown, surely in three minutes the reflection would have changed. (00:21:15)
Revealing mistake: When the police car flips on the highway, we can see the film crew in the other car filming it. In this shot you can see the canister used to flip the car on the highway. (00:27:20)
Revealing mistake: The BMW crashes through a metal gate at the border but does not suffer as much as a scratch.
Revealing mistake: When the BMW joins the freeway, the cop car follows. If you look, you can see planks for the cop car to go up the curb safely.
Revealing mistake: Throughout some of the more dramatic scenes in the car, like skidding round corners and narrowly missing other cars, you can see it is not Charlie Sheen at the wheel.