23 X-Men Movie Mistakes You Probably Missed

20. Charles Bangs His Head - X-Men: First Class

First Class was a triumph both in terms of narrative and the technical side of the film, with some astonishingly good shots - including the exceptional lifting of the submarine sequence - where you genuinely couldn't see the strings behind the magic.

And then there was the scene just after the X-Men's quinjet turns up to avert nuclear war when Professor X over-zealously bangs his head into the clearly perspex window of the jet, which somehow made it into the film.