Continuity mistake: At the very end of the film. When the 3 helicopters and the seaplane come into land, it is quite a wide shot, with no boats visible. A few minutes later, when the seaplane takes off again, a big white boat is near the coast. Even if the boat was off camera during the landing scene, a few minutes was surely not enough to get that far, and that close to the shore.
Continuity mistake: During the shooting scene by the mansion, the same poor soldier gets killed from different angles, again and again and AGAIN....
Continuity mistake: When Arnold lets go of the landing gear he lands in the water. A few seconds later we see him walking up towards the beach, and we can now see that he is only wet from his waist down. It's not likely that he would have been able to land standing on his feet and not not becoming completely soaked.
Continuity mistake: Rae fires a rocket at the police van, first she fires it back to front then the second time she fires it correctly only this time she is knocked back by the recoil, why wasn't she affected the first time and pushed forward? Also there should be no recoil with a rocket launch.
Continuity mistake: At the end of the movie, Arnie puts on his flak jacket then his make-up, but when he takes off his jacket, he's got camouflage on.
Continuity mistake: When Matrix is infiltrating the base (just before he blows everything up), and just after he has cut a soldier's throat and planted a bomb, he is confronted by two more soldiers walking along with rifles slung. Seeing Matrix, the two frantically start un-slinging their rifles. Matrix throws two knives at them. Next we see the two soldiers falling with knives in their throats... and the one on the right has his rifle fully slung again.
Continuity mistake: In the fight scene where Matrix and Bennett are trying to force each other against the furnace, watch Bennett's hands as he struggles with Matix. In one shot Bennett has his hand pressing against Matrix's face, in the reverse shot he is holding Matix by the back of his head/hair. His hands switch back and forth several times.
Continuity mistake: While on the compound, there is a scene where some army guys are driving at Matrix in a jeep. They drive past some random army supplies and are about to surprise Matrix when he turns around and nails them with his rocket launcher. Or he sort of nails them. Actually, the army supplies that they had just passed have suddenly relocated and are crashed into by their jeep. Rewind and play repeatedly for full humour effect.
Continuity mistake: The style of Cindy's car changes when Matrix and Cindy are tailing Sully. Note the front grille with the center emblem that suddenly appears, the style of the headlight chambers that surround the headlight casings, as well as the two bumper guards that disappear and reappear. Obviously different vehicles.