Corrected entry: Pyro says that the mutant gene is carried by males, yet Iceman's brother is not a mutant. This is impossible. If the mutant gene is carried by the father, then the gene must be on the Y chromosome. Refresher: Males; XY Females; XX. This means that the father must be a mutant as well unless something triggers the mutation in the fetus. Which also means if a child ends up being male, it will always get the father's Y chromosome, and the brother to Iceman must be a mutant also.
Corrected entry: When Nightcrawler is running down a long corridor, a guard is firing at him. Then Nightcrawler teleports and the guard stops firing for a moment. However, he resumes firing before Nightcrawler reappears and kicks him through a doorway. (00:02:10)
Corrected entry: After the gas is released in the plastic prison, Xavier turns around, reaches for the plastic doors and calls Scott. Right before he passes out you can see smear marks from his makeup on the door from a previous take.
Corrected entry: After the attack on Xavier's mansion we hear from one of the characters, possibly when Stryker's soldier reports back to him, that they have six children held captive. When we get towards the end of the film the camera makes it quite awkward to notice but there are only five children held captive. You can see this slightly clearer when Mystique is watching the CCTV cameras and when Nightcrawler tries to rescue them, as well as when they finally emerge from the base and are mostly in a line.
Corrected entry: In the scene in which Xavier is being tricked into entering Cerebro II, we can see a soldier pushing Jason while in his wheelchair into Cerebro II. In the illusion, Xavier and the little girl(Jason) enter the room and have the door swiftly close on them. If Xavier was leading Jason(little girl) and the soldier then where did this soldier go after the door closed on them? Jason couldn't have kept on pushing himself forward without the soldiers help. In the next scene involving Cerebro II the soldier is gone.
Corrected entry: When the X-Men discover that Magneto has reversed Cerebro to target regular humans Cyclops goes to blast the door but Jean tells him not to as opening the door while the Professor is linked to it would kill him and everyone linked to him. So how come Magneto was able to open the door in the first place without killing all the mutants who were linked to the Professor?
Corrected entry: In the scene where Professor X and the "little girl" are about to enter Cerebro (at the X door), the little girl's eyes are the same colour. The rest of the movie she has a blue and green eye.
Corrected entry: In the scene where Wolverine sniffs out a beer in Bobby Drakes house, you see that when he opens the fridge, his beard joins from each sideburn all the way around and under his chin. But when they cut to him taking a swig of the beer, you see that the hair from under his chin is shaven like his top lip and the front of his chin. (00:50:50)
Corrected entry: When Xavier is captured by William Stryker, Stryker puts a 'neural inhibitor' on him. Jason then begins doing his mind control on Xavier, causing him to enter Cerebro. When he enters Cerebro, the 'neural inhibitor' is gone.
Corrected entry: Early in the movie, when the renegade colonel is in the oval office, he looms over the President and says that when the president was still very young, he, the colonel, was flying Blackhawks over Vietnam. The UH-60 Blackhawk helicopter wasn't added to the military inventory until the 1985-1989 timeframe, and the Vietnam War ended in 1975.
Corrected entry: In the scene where Magneto is pulling the metal out of the guard's blood, how come the guard remains still in the air? The metal would exert a force on the body when being pulled through the skin and out, and would pull the guard towards him. Since Magneto can only control metal, he could not push the guard backwards in any way.
Corrected entry: In the scene where Stryker enters the fake Cerebro to give his final instructions to Xavier, he punches a code in a nearby panel to open the double doors. But in an earlier scene the Professor enters the same room and there is no one anywhere near the panel to open it (the guard was behind Jason's chair, and couldn't have got to the panel in time). With no real retinal scanner (it was only an illusion created by Jason), how did those doors open?
Corrected entry: All Storm's previous appearances suggest that, although she can control the weather, she can't make weather effects appear in places where they couldn't normally occur (for example, in the first film, she couldn't just shoot Toad with a lightning bolt while he was in the building; she had to blow him out of the building so he'd be exposed to the sky). So how can she create a snowstorm inside Cerebro 2, deep underground and protected from the elements?
Corrected entry: When the missile from the fighter jet strikes the Blackbird, it hits and explodes at the back of the jet above the engines. However, the damage is shown internally in the rear ceiling of the cabin which Rogue gets sucked out of. Later external shots show this as well.
Corrected entry: In the scenes shot in upstate New York / Boston, the weather is warm and sunny, probably either summer or early autumn. But in the scenes portraying the post in the BC Rockies, it is the dead of winter, with tonnes of ice and snow. Although the two climates are very different, the difference is far too drastic. If it were early fall in Boston, there would possibly be frost up in the northern Rockies, but not full out winter.
Corrected entry: In the bar scene where Mystique meets with the prison guard the TV is on and you can hear it. When the guard tells the bar tender to turn it off the bartender just changes channels. After Mystique carries the beers over to the guard to talk to him you can still hear the TV, but if you look you'll see that it's been turned off.
Corrected entry: When the dam starts to break apart at the top the water shoots straight out. This is physically impossible. As any engineer knows the water pressure is highest at the bottom part of the dam and very low at the top. The water should have been just pouring out not shooting out.
Corrected entry: Given how Mystique can apparently infiltrate any place with her shapeshifting abilities and other talents, why didn't she just free Magneto herself by impersonating the guard, rather than this convolute plan involving injecting him with iron? Or better yet, since Magneto is allowed guests, why not impersonate Xavier?