If you're reading this and you're a film buff, you probably know that Gary Cooper, who played Lou Gehrig in Pride of the Yankees (entire movie here, free) had a real tough time learning to bat and throw left-handed. The filmmakers' solution? Outfit Cooper in a "backwards" Yankees jersey, have him run to third base after hitting the ball ... and then simply flip the images for the finished movie.
Simple stuff, right? I've been reading about that for decades, and never thought to question it.
Fortunately, researcher Tom Shieber did ...
First, I examined every scene in the final cut of the movie, as well as a number of publicity stills, for evidence of the film being flipped. However, I cannot vouch for what may have taken place in scenes that ended up on the cutting room floor.
Here is Shieber's whole article, and it's magnificent and that's all I'm going to say because I want you to read all the way through and discover the truth for yourself.