Revealing mistake: Inside the tunnel, Roy is on the car's hood, with the car swerving all the time. When the angle changes to a POV of the baddies he doesn't move, as if he was glued to the roof, revealing the security trick.
Revealing mistake: In the scene in Salzburg train station, the trains that can be seen in the background are marked RENFE, which is the Spanish state-owned train operator. Also, when Fitzgerald looks at Roy through the window of the train, the station signs are "Salzburg Bahnhof", but only a few seconds later, when they are walking on the platform, the same signs are "Sevilla Santa Justa". This scene was actually shot in Seville train station.
Revealing mistake: When Roy is on the car's hood and makes a van flip in the air, the mechanism to lift it up is visible.
Revealing mistake: After Roy abducts June in the diner and shoots Rodney he takes off and skids the car. Skid marks with the same pattern are all over the pavement from previous shots.