Continuity mistake: The two Lamborghini women get stopped by police. The one in the red suit is on the right, with her front zipper up. In the next shot the other race contestants zoom on by, and the two women are shown from behind. In the next front shot, her zipper is down. The next shot from behind, show more race contestants zooming by. The next front shot, her zipper is up again, then she pulls it down to pull out her driver's license for the officer.
Continuity mistake: The stock car that Mel Tillis and Terry Bradshaw jump into the pool and tune up outside the meeting is a Chevy Laguna, yet when they punch the clock at the start of the race, it's a Monte Carlo.
Continuity mistake: We can see Sammy Davis Jr. as he slits Burt Reynold's car´s tires. Later we can hear Reynolds as he says that they lost more than 2 hours by fixing the damage. But how comes that at the petrol station, Reynold´s car leaves even before Sammy Davis Jr. and Dean Martin arrive there?
Continuity mistake: Bert Convy's character is wearing a Goodyear ballcap and is riding his motorcycle down the motel corridor. He crashes into the Cannonball Pub, he is now wearing a helmet. As he launches himself over the stairs in the motel lobby, he is back wearing the Goodyear hat. (00:30:58)
Continuity mistake: When Mad Dog pulls up to the starting line, we see Batman get out to punch the time card in the clock. We then see a brief shot of Mr. Foyt's car, but the car at the starting line is a Camaro, not Mad Dog's pickup.
Continuity mistake: JJ and Victor's ambulance's engine sounds are dubbed, and a few times you can hear the sound of shifting a manual transmission when the ambulance is shown to have an automatic.
Continuity mistake: In the scene where the GMC pick-up truck jumps the train, you see the front of the truck being damaged during landing. Later in the movie, the truck is undamaged.
Continuity mistake: In the scene where Roger Moore's car is filled with smoke, in the shots from the bonnet the smoke is in the front surrounding the 2 people, but in the wide shots from the side the smoke is only visible in the back of the car.
Continuity mistake: After the girls in the Lamborghini are pulled over, they get passed by several other Cannonballers. Blake's Ferrari passes them twice.
Continuity mistake: After the Sheik pulls up to the restaurant and the car hop brings out his food, he pays the girl by sliding a ring onto her finger. When he pulls away the first time, you can see that she has a wad of cash in her hand. The problem is, he hasn't given the money to her, yet. In the next shot, he backs up and as he says, "Get a physical," he places the money in her hand.
Continuity mistake: In the scene where the pickup truck jumps over the train, you can see the passenger's cowboy hat fall off on impact, but in the very next scene he is shown still wearing it.
Continuity mistake: While the police are chasing the Lamborghini during the opening credits, a car passes both of them on the right side as if it were England. (00:03:35)
Continuity mistake: Roger Moore is in the crowd at the finish line as Dom Deluise and Burt Reynolds are talking to each other. A few seconds later you see Roger Moore's car driving to the finish line.
Continuity mistake: A cop pulls up beside the two guys driving the GMC, and the driver yells to the cop that he has no brakes, so the cop moves along. The two guys laugh about it as next shot suddenly shows train tracks 1,000 feet ahead of them with a bunch of people working on a railcar, and a roadblock sign out front.
