Continuity mistake: When the main character goes to visit his friend that had been shot in Iraq, they're driving down a country road in a 2 door Dodge Challenger, but when inside the vehicle it's a Dodge Charger, which is a four door car.
Continuity mistake: When Adam Schumann visits his friend that got shot, they are in the Dodge Challenger. From the inside it's a sedan with four doors, but from the outside of the car it's a coupe with two doors.