17 Stupid Mistakes That Somehow Made It Into 2016 Movies
7. VistaVision Comes Early - Hail, Caesar!
As Hobie Doyle's (Alden Ehrenreich) movie Lazy Ol' Moon begins screening, the bottom-left corner shows that it was filmed in VistaVision, a widescreen version of 35mm created by Paramount in 1954.
However, look closely and you'll also see that the movie's copyright credit lists the year as "MCMLI", which is Roman numerals for 1951, a whole three years before the tech ever became available.
The Coen Brothers are typically lauded for their impeccable attention-to-detail, but this is one of their rare slip-ups. Of course, some of their fans will inevitably refuse to believe it wasn't on purpose, just to keep fans of classic cinema on their toes and all...