When Don and Ann begin their trip, they are riding in a 1966 Mercury Comet Caliente convertible. But when they stop for their picnic, the car is a 1965 model.
When the car is stuck in the mud, the shots from behind the car show Donald more to the side of the car, yet the shots from the front show just his upper body exposed.
The second time Ann Marie throws the coin into the toll collector, the light remains red and they still go.
When Don is about to push the car the shots from behind the car show the shadow of a boom microphone near the dirt road on the left side of the screen.
Cameraman's shirt is reflected in the vent window just after Ann sits down behind the car's steering wheel.
Right above windshield, while Don and Ann are talking and the car is parked on the bridge.