At the start of the film when the oil tanker passes the scene of the accident the crew and equipment can be seen in the reflection of the tanker.
Near the beginning of the film, after Alan successfully passes the truck and pulls over to the side of the road, he leaps out of the car without setting the parking brake. Denise is seen pulling on the handbrake, but the car continues to move until the end of the shot, with the front of the car going past the roadside sign. In the next shot, the car has been moved back so that its front is even with the sign.