Continuity mistake: At the start of the movie when Goodspeed and Marvin Isherwood are in the FBI lab trying to diffuse the gas bomb, when Goodspeed first walked into the chamber he stated his name, etc. he said that the time was 9:00am. However in the background you can see a clock that says the time is around 4:15. (00:08:35)
Continuity mistake: When Nicholas points a gun at Connery on the balcony, he pulls the gun's hammer back. In the next shot it's not pulled back anymore. (00:39:45)
Factual error: When Cage gets into the Ferrari, the camera changes for a few seconds showing the gearbox. In slow motion it is obvious that Cage shifts into 3rd gear instead of 1st, however the car makes a very impressive tyre-burning start. The F355 is indeed a very powerful car, but this would be simply impossible to do in 3rd gear. (00:44:14)
Continuity mistake: During the Hummer chase scene, after the Hummer smashes into the truck with all the water jugs, you can see from a shot inside the Hummer that the windshield is cracked. For the rest of the chase, it isn't. (00:45:28)
Continuity mistake: Nick Cage is chasing Mason in the yellow Ferrari. The windshield breaks at least twice, but is perfect in the next shot. (00:45:55)
Revealing mistake: During the car chase, when the first FBI car flips over, the device used to flip it over is visible on its underside. (00:45:55)
Continuity mistake: When Goodspeed is on the roof of the lighthouse with the last pearl configuration of poison gas, one of the 'pearls' drops off the bottom. As he chases it across the roof, from the front shot he has his right hand outstretched. As he dives to grab at it, the shot switches to the side and it is his left hand that grabs the 'pearl'. The shot then immediately switches to a close up of his face and you can again see his right arm outstretched. (01:54:30)
Revealing mistake: When Mason is having his hair cut, after finishing up, he is talking to Womack and turns his back on him. If you look at the back of Mason's neck, it is clear that he's not just been freshly shorn; there are whorls of hair just above his collar. (Either that, or the barber was terrible at his job).
Continuity mistake: In the car chase scene, Mason is driving the stolen Hummer and he hits a meter maid truck sending it flying into a telephone pole and blowing it up. They slow down the film a little here and show us this hit from several different angles including from above. When they slow down the film you can see that the Hummer is turned sideways in the impact but in the next frame it drives off as if it had just tapped the meter truck and not slammed into it as shown.
Continuity mistake: In the chase scene, Cage is in a real Ferrari F-355 at some points, but the car switches to a replica 'kit car' in various scenes. When it is crushed, you can see the fibreglass kit car body pop off to reveal the Pontiac Fiero guts. I heard our friends from Maranello were not impressed.
Continuity mistake: During the movie when Mason is talking with his daughter in the park, his tie in one cut is tied differently then in another cut of the same scene. Look closely at the stripes.
Continuity mistake: During the chase scene, just before the Ferrari is destroyed by the trolley, you see Cage dive out of the car and a rear view of the trolley hitting the car. In this shot, you see the complete rear end of the Ferrari, with a blue pickup next to it. In the very next shot, the Ferrari is getting sandwiched between the trolley and the pickup.
Continuity mistake: When Nicholas Cage steals the motorcycle and is talking on the cellphone, the camera shows a close up. For a split second it shows the front tyre of the bike, and if you look closely the tyre is not turning.
Continuity mistake: When Hummel sends patrols in search of the SEAL Team, the Marine with the messed up hair-cut(the spanish guy with the "bun" on his head) stays behind and is watching the monitors. There are shots of him watching the monitors and saying "something's not right." Yet there are also shots of the Marines on the patrols, and he is one of them. The it cuts back to the monitor and he is the one that alerts the Marines the shower room has been breached.
Continuity mistake: As the seal team are about to enter the shower room, we see them cutting the sensor beam using two mirrors. In the next shot we see the seal removing both of the mirrors from the drain ready for incursion. In the shot in which they pull back the drain, one of the mirrors is still there.
Factual error: When Goodspeed crashes the Ferrari, his airbag deploys and he must shoot it to get out of the car. In reality, airbags inflate and deflate again in less than a second - the gas escapes through vents or the material itself, so there's no way for one to stay inflated.
Factual error: Atropine is on two occasions in the movie stated to offer some kind of protection against corrosive gasses. First, against the nerve agent/gas Goodspeed encounters in the beginning of the movie, which is corrosive enough to eat through a protective suit. Secondly, near the end of the movie against the cloud of VX gas; here Goodspeed injects Atropine into his heart and survives without a scratch even though it is stated that VX will melt your skin. While Atropine is used to counter the effect of nerve agents, Atropine (or any other drug invented by man) wouldn't do anything against a gas that can eat through a protective suit or dissolve skin. In this case the muscle contractions created by the nerve agent would be the least of your worries.
Factual error: VX is a real nerve agent and it is considered one of the most deadly. But VX does not melt away your skin. In reality, VX gas causes involuntary muscle contractions that result in death by asphyxiation. Apparently this wasn't dramatic enough for Hollywood. It's also amber, not green.