Continuity mistake: Just before Natalie and Jack have sex in the BMW it is blue sky outside, Jack sees the sign for the Mexican border being 10 miles away then the camera shows the speedometer reading 90mph, therefore they would be at the Mexican border in under 7 minutes (unless they went a different route which they wouldn't want to do because they are being chased by the police) however in the next scene presumably after the sex it is dark outside and they still have 1 mile left (approximately) till they reach the road block at the border, surely the sun doesn't go down THAT fast.
Continuity mistake: Kristy Swanson vomits from the passenger side window of her car; the resulting mess ends up on the windshield of the ill-defined musical sensation turned actor Henry Rollins' police car. The incredible force of Ms. Swanson's projectile vomiting notwithstanding, as the chase progresses, Mr. Rollins' windshield becomes magically squeegee clean!
Continuity mistake: At the beginning of the film when they're in the car, Natalie drops the cigarette lighter on Jack's trousers. Shortly afterward, the whole car is full of smoke. After they turn around a sharp corner, the camera switches to an outside shot in which the smoke is gone. In the next shot, back in the car, the smoke reappears.
Continuity mistake: When the cops first pull up beside the BMW and Jack pulls a gun out to shoot the cop with the shotgun, he hits a bump and blows the cop car's tire, causing it to flip. They show it flip behind the BMW, but the other 2 cop cars (on the passenger side and behind the BMW) have disappeared.