Last night (Sunday), there weren't any good movies to watch (because Sunday) so I was flipping through the channels and on BBC Three, the TV guide said Great Movie Mistakes 2. I figured it was about aberrations that should have never been released. Turns out it was more about continuity errors (like a piece of clothing disappearing or the placements of hands differing within scenes). Pity, because my idea would have been much more entertaining, but I guess the BBC would get into trouble for it.
Go watch CinemaSins instead.