Continuity mistake: When Tracy and Nick arrive at Tracy's ex-boyfriend's house in her helicopter, Shawn's (Tracy's ex-boyfriend) mini-pool falls apart and water spills everywhere. He and the girl are both submerged in water and go flying. About 10 seconds later, he runs to his car in a collared shirt and he is completely dry.
Visible crew/equipment: If you look closely behind the log, as Duane and Blaine plummet over the hill in their car, as they chase the key-cutter in the hot air balloon, you can see a ramp placed, however it is painted to blend in with the ground. If you watch closely you can even see it bounce. (01:00:40)
Continuity mistake: After Randy gets lipstick on his hand, he smears it on the steering wheel. But when the bikers are attacking them, smashing the car up, in many shots you can see the steering wheel has no lipstick on it. It returns later, when it gives Randy a moustache. (00:56:25 - 01:08:10)
Visible crew/equipment: When Vera and Merrill crash into the pile of cars, a skeleton rolls out of the back of the car in front of them. Then in the next shot the skeleton falls downward, and as it does you can see a thin metal wire attached to the back of the skeleton, obviously used to control it. (00:53:25)
Continuity mistake: Tracy throws a wrench and other things onto her (soon-to-be-ex-) boyfriend's truck. Several dents appear, including on the roof. She also drops a can of orange paint which spills up the windshield. However, for the remainder of the movie after this scene (as her boyfriend drives it away and later Tracy throws him out and takes it herself), there isn't a single dent left on the truck. Not just as she chases her boyfriend, but for the rest of the film.
Factual error: Security at the airport must be a little lax if two men are able to cut into the fence and climb the radar tower without being noticed the whole time, making all that noise, etc. Also, when the man in the control tower (with the binoculars) noticed the truck hanging, you'd think that security or police would notified. No-one ever questions them, and in the next scene we see a worker at the "U-Rent-It" car rental, checking his licence. No cops investigate the matter, nor is security called. (00:30:15 - 00:33:05)
Visible crew/equipment: When the rocket car zooms past the repair mans garage and it collapses, you can see a wire running across the outside of the garage, from above the window to behind the petrol pump, and there is a white cable trailed across the road to the left of the garage - in an earlier shot you can clearly see these were not here. (01:16:00)