Continuity: After a long car chase about mid-way through the film, the camera pans over the highway littered with smashed cars and hundreds of cars piled up.  In the middle of this, you see a van painted a little like the Partridge Family bus....definately a one of a kind van.  Then you see footage of the car which escaped the chase going down an empty side street and passes the same van.  No way there are two vans like this one.

Revealing: During the freeway chase, an eighteen-wheeler jackknifes and crushes a number of cars. A wire is visible pulling the trailer out from behind the cab.

Factual error: After the car chase in the film, as the car leaves a mess of vehicles behind it, it is obvious that the directional flow of the "props" traffic was on the left side of the highway, as if the film was shot in England. But it was shot in USA. The direction signs on this Los Angeles highway are also not visible to the traffic. Drivers would have to look back to see what exit they just missed.