Other mistake: When Jordan drops Rusty's truck into the compactor, the excavator and its claw seem just too small for the job. You can see the truck has been sawed shorter as the truck's rear axles stay on the ground while the cab goes in the compactor. There is no possible way for the truck to snap in half like that when lifted. This small excavator would just simply have flipped over trying to raise the truck by the engine compartment.
Revealing mistake: At the end of the movie, it's pouring rain but the 2 survivors aren't getting wet at all.
Continuity mistake: The car has rally seats through most of the film but at the end it has regular car seats.