20 Stupid X-Men Movie Mistakes You Probably Missed

13. Cars Of Future Past - X-Men: First Class

And staying with anachronisms, X-Men: First Class was just as guilty of putting impossible things in historical periods they didn't belong in.

For Matthew Vaughn's film, despite presumably having a team dedicated solely to dressing sets and making sure everything matches the time setting, they managed to use a pillow design 40 years before it was designed (fans spot EVERYTHING) and a photograph of Einstein that wouldn't be taken for another 5 years.

The main problem, though, was cars. When Oliver Platt's tragic government agent brings Xavier to his secret CIA facility, he's shown driving there in a Cadillac, which remarkably wouldn't be released for another 10 years after the film's 1962 setting.