Continuity mistake: In one scene we see the map of the power grid of Eastern Sector shutting down. All sectors are red. A few scenes later we are in Warlock's basement. He has the same map on one of his screens, but there some sectors are red and some are green.
Continuity mistake: When John and Matt are in the patrol cars and Gabriel has them rerouted to a blocked road, there are no cars on the road besides the patrol cars, but throughout the scene when the camera cuts you can see traffic moving smoothly along with them.
Continuity mistake: During the final chase, the right front tire of the Freight liner is flat at one point after hitting a number of parked vehicles. The next shot showing the front of the truck shows the tire is fine.
Continuity mistake: The hacker slaps McClane's daughter moving her head to the right, hair messy around her face. The immediate angle from the hacker's point of view shows her head tilted to the opposite direction, with her hair perfectly brushed.
Continuity mistake: In the semi chase scene when Bruce takes control of the truck he initially shoots twice through the door and you see two 'bullet holes'. When the cut to the cab the driver is shot 5 more times. After Bruce throws out the driver and closes the door you only see the two original 'bullet holes'. There should be about seven of them.
Continuity mistake: As McClane is powering up the helicopter to fly to Warlock, the rotors are already up at full speed. The next cut shows the helicopter in full from outside with the rotors turning much too slow compared to the previous and following scene.
Continuity mistake: When being escorted by the FBI near the beginning, they are in an FBI car which is plain white. They then get shot at by the helicopter and are seen speeding away in the FBI car. A few shots later this car becomes a normal police squad car.
Continuity mistake: At Woodlawn, after McClane takes Russo out and taunts Gabriel over the radio, Gabriel sends Rand after him, saying, "Kill this guy, and I'll give you Mai's share." But four minutes later, when Gabriel has Lucy talk to McClane on the radio, Rand can be seen standing casually against the wall behind him, even though he already left. (Timecodes from unrated edition.) (01:39:20 - 01:43:25)
Continuity mistake: When Running to the car after the apartment shootout, Farrel gets in the car and McClane is not around by the car as we can see the car. However when Farrel shuts his door, McClane is already in the car. In the previous shot we could see McClane behind Farrel. (00:15:35)
Continuity mistake: When you see all the power going off, you see the same clip being used twice. The power goes off, it shows the airport and hospital, then it shows the power going off in the same place again. (01:14:40)
Continuity mistake: McClane rips the airbag out and tosses it on the road. When they drive away, the airbag has gone. (00:57:30)
Continuity mistake: When McClane and Rand fight in Woodlawn, Rand falls down through two sets of blades rotating at high speed. Once he goes through them, the blades appear to be slowing, but at the next shot, not one second later, the blades are rotating at full speed again. (01:41:55)
Continuity mistake: When McClane is driving the police down the ramp to the tunnel so he can elude the helicopter, the car's windshield doesn't have any bullet holes or cracks in it, even though it did just a few seconds earlier. (00:37:55)
Continuity mistake: In the next-to-last shot of the movie you can see giant letters SOU on the warehouse behind Bruce Willis sitting in the ambulance. In the final wide-out shot of the movie the same warehouse has no lettering.
Continuity mistake: In the scene where the semi driven by McClane is chased by the F35, the semi hits multiple vehicles causing it to damage. The driver side headlights are smashed and the bumber and fender are almost scraping the ground. In the next shot, headlights, bumber and fender are fine.
Continuity mistake: While McClane is taking control of the Freight liner during the final chase, he jumps onto the driver's steps, and we see the driver's side window is closed, he shoots the driver and whips the door open, and the window is now open. He climbs into the truck and slams the door, and the window is once again closed. There was obviously no time for the window to be opened and closed during the fight.
Continuity mistake: At the very end when McClane is talking to Farrell, he has three steri-strips over his left eye, but when he goes back to his daughter he only has two.
Continuity mistake: At the end when McClane shoots through himself to kill the bad guy, it's though his right shoulder into the bad guy's right shoulder. The next shot of the dead bad guy has the wound in his left shoulder.
Continuity mistake: John M is driving to the Eastern electricity station and chatting. The view out of his window shows him driving past the same distant hill at least three times. Also the speed is faster out of the passenger's side than the driver's.
Continuity mistake: When the one bad guy has got McClane near the start in the alleyway, there is one shot where the bad guy is facing the other way. He goes forwards feet first for one quick shot then goes backwards to hit the dumpster. (00:16:05)
Suggested correction: Not really a mistake seeing the same hill 3 times. Also the speed can alter quite easily. Not a mistake.
Ssiscool ★
Also, the road could be curving slightly, changing the angle of view with the camera change.