Continuity mistake: After chasing down Sully, the yellow Porsche is totally wrecked on the left side, until Arnie drives it away, and it's fine. Later, when Arnie and Cindy arrive at the hotel, the car is wrecked again. (00:39:50)
Factual error: If the access hatch to the nose wheel well on an airliner was opened at any time during the flight, every alarm panel in the cockpit would light up like a Christmas tree. In this case happening within seconds of takeoff the pilot would immediately declare an emergency, turn around and land at the airport he had just left. (00:22:10)
Continuity mistake: When Matrix is driving the red car and trying to run Sully's yellow car off the road, watch the front bumper of the red car. At some points it is hanging off the car, and at others is it attached onto the car. (00:39:50)
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. (01:20:30)
Revealing mistake: When Matrix hits the button to blow up the village, you can see that there are only cardboard stand-ups of men next to the buildings blowing up. Also, for some reason the top of the watch-tower also blows up even though Matrix never put a bomb there. (01:11:00)
Revealing mistake: In the siege at the end, there is a shot where you can hear the squibs (small charges that explode on a stuntman to make it appear he was shot by a bullet) going off on one of the soldiers as Matrix shoots him. (01:13:10)
Factual error: The shot of Matrix landing in the swamp after jumping from the plane isn't consistent with the free fall. The final shot indicates he has not fallen more than a couple meters. On top of that, after jumping from a DC-10 doing over 150 mph, he has no forward momentum when he lands. (00:24:39)
Visible crew/equipment: When Matrix is holding Sully over the cliff, you can see the cable holding him up. (00:40:51)
Continuity mistake: During the shooting scene by the mansion, the same poor soldier gets killed from different angles, again and again and AGAIN.... (01:12:34)
Continuity mistake: At the start of the film we see two guys on the bin wagon. The one on the left of the screen already has his Uzi in his left hand, yet in the next shot we see him lean into the back of the bin wagon to pick it out. (00:01:45)
Continuity mistake: When Bennet and Matrix are fighting at the end. Bennet has his hand over Matrix's face. During instant camera cuts, the position of his hand alters on Matrix's face and neck. (01:18:55)
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. (00:57:10)
Suggested correction: She was pushed forward against the front windshield which kept her upright whereas when firing it the right way she was thrown backward into the back seat. And rocket launchers will have some measure of recoil from the propulsion of the rocket firing out of the front of the launcher, how much depends on the time and force of the rockets being firing as every weapon has some form of recoil from firing.
Rocket launchers don't have the recoil you think. The propulsion of the rocket firing out of the front is countered by the gases expelling out the back behind the shooter. But if she was pushed forward (which she's not), her waist was above the top of the windshield, so the top of her body would should still lean over, even if it didn't cause her to topple over like she does with the seat.
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. (01:04:15 - 01:14:40)
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. (00:24:41)
Audio problem: Towards the end there's a firefight between Matrix who wields a shotgun and El Presidente who is armed with a Steyr AUG. The weapon sounds used for the Steyr AUG however are from a MAC 10 or an UZI and don't sound a bit like it. (01:18:13)
Factual error: As noted elsewhere, it is simply not credible that Cindy, a trainee pilot, could land an seaplane so neatly, but it should also be pointed out that she banks into a low level formation on three helicopters - a very tricky manoeuvre, and then immediately after take off banks tightly into a high speed flyover of the squad on the beach. Both of these stunts would demand a very high level of skill from a pilot, especially one flying a lumbering old seaplane. (01:05:10 - 01:24:45)
Suggested correction: I respectfully disagree. 1. We don't know how many hours she has toward her license - average is well more than the minimum. She may have upwards of 70+, granted, probably in a 172. But watching this scene, the plane was a full 5 seconds behind the choppers. That's not formation. She banked left, straightened out, and landed. I believe a higher-time trainee very well could have done this. Now, if she had NEVER touched a multi-engine plane before, let alone a seaplane, the whole thing is off.
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. (01:10:35)
Continuity mistake: When Matrix first rips out the seat of Cindy's car and sits in its spot, his body sits very low to the the bottom of the car. You can even see in the next scene that his head is clearly lower than Cindy's. However, during the chase scene, his head is level with Cindy's. (00:29:55)
Visible crew/equipment: In the scene where John uses a Caterpillar to enter the scuba and guns shop, the driver is a stuntman, in both slow or normal motion. (00:51:45)
Audio problem: The scene where Bennet and Matrix are fighting towards the end of the movie, before Matrix kills Bennet they have each others throat in their hands and one of their backs is against the furnace. While they are grunting and groaning, if you listen carefully, you can hear one of them say "switch" just before they change positions. (01:19:05)