Continuity mistake: When Segal and LeBrock are being chased across the field, and they drive the jeep through a gazebo, Segal is driving. However for a split second as the jeep passes through the gazebo Segal is in the driver seat of a right side steered jeep. The license plate also switches sides but reads correctly (left-to-right) indicating that the shot is not mirrored.
Deliberate mistake: When Steven Seagal and Kelly LeBrock are in the jeep, being chased through some fields by the cops, some of the shots of the jeep are flipped. Note the bullet holes on the windshield switch sides, as does the driver/steering wheel, the windshield wipers and the front license plate. As an aside, also note the numbers/letters on the license plate that have been altered via CG in the flipped shots.
Continuity mistake: In the train station scene, when O'Malley is shot, watch the front of his shirt as he hides behind the cab so he can start shooting the bad guys. He was running away from them when he gets hit once in the back. Then, as he turns around to fire back behind the car, there are two bullet holes in his shirt with blood dripping down like he had been hit. But he was only shot once in the back.
Continuity mistake: During the fight in the billiard room, Storm kills Jack Axel by stabbing him with a pool cue and Axel falls to the floor and dies with the cue still stuck in him. When Hulland enters the room shortly after, we see Axel still laying dead on the floor, but the pool cue is gone.