Imelda Staunton filmed for two days, but Seagal did not film any reverse angles with her. All the scenes where her character speaks with Seagal's character were done with the help of a stand-in and a Romanian film student.
In the first scene, the Audi wagon has 2 people in it, yet during the car chase it can be clearly seen there there is only 1 stunt driver, and no passenger.
During the chase between the car and the helicopter as they flee the safe house, the helicopter wrecks the lid of the trunk and riddles the rear window with bullets. In the next scene all the bullet holes are gone and the rear window is whole again.