10 Strangest Mistakes In Movies

10. The Face-Morphing Winklevoss Twin - The Social Network

Even a director as absurdly meticulous as David Fincher can't get everything right 100% of the time, as evidenced by this peculiar oversight in his phenomenal drama The Social Network.

One of the film's greatest triumphs is the visual effects coup of having Armie Hammer play both Winklevoss twins, Cameron and Tyler, and because Hammer wasn't particularly well-known in 2010, many simply assumed that twin actors were hired for the gig.

Instead, actor Josh Pence played Tyler's stand-in on-set while Hammer played Cameron, and Hammer's face was later digitally mapped over the top of Pence's. It's a practically seamless effect, save for just a single scene.

When the twins approach Mark Zuckerberg (Jesse Eisenberg) to work on their website early in the film, Josh Pence's face is actually visible at both the start and end of the scene for about a second each.

Pence looks similar enough to Hammer that it's not immediately obvious, but once you do notice it, you'll never not.

Quite how these shots simply didn't render Hammer's face is anyone's guess, yet they incredibly managed to slip past even a strident perfectionist like Fincher.