On at least one occasion, the Saab is shown being rammed from behind and the lights getting smashed. A little later they are all intact and shining again. Similarly, the Cadillac has duff lights which swap sides or rectify themselves without provocation
The movie alternates between two black 1957 Cadillacs, a four-door Eldorado and a Fleetwood 75 limousine. "Eldorado" lettering is visible on the trunk lid and the curved rear door window frame differs from a square rear limo door. A similar replacement car may have been obtained for additional filming under different weather conditions following the destruction of the original car.
Snow repeatedly appears and disappears on the roads and woods between shots.
The Saabs pedals alternate between those for a manual gearbox and an automatic gearbox.
The hubcaps on the SAAB change between shots.
The black Cadillac is incorrectly identified in the movie as a '57 Eldorado. It is, in fact, a 1957 Cadillac Fleetwood Series 75 Limousine.