As you may have heard, Christian Bale is incredibly dedicated to his work as an actor and the characters that he plays, especially when it comes to transforming his body. He bulked up to play Batman in Christopher Nolan's Dark Knight trilogy and gained a gut for American Hustle. But one of the most terrifying transformations he made was in 2004 for The Machinist. The guy had to have gone through hell to lose as much weight as he did, but apparently, it got even worse than we thought.

In a Reddit AMA, Machinist co-star Michael Ironside revealed a story about Bale's ass that is actually kind of horrific

"I remember on The Machinist,I came to work one day, and we were shooting in Barcelona, Spain, and our trailers were these little Spanish 2-wheeled cabanas that were parked in front of this actual working machine shop. And I heard 'pssst...Michael!' from behind one of the cabanas. "And I went over, and it was Chris. And he said, 'Can you look at this?' And he turned and dropped his overalls, which he was naked under. And he had lost an INCREDIBLE amount of weight for the character. And he said 'Michael, there's something wrong with my ass, can you have a look?' And the muscles in his ass had literally dropped out of the sockets of his hips. The dignity of the muscles, his ass had literally dropped out of the hips and thigh bones. And I said, 'Hey Chris, your ass has dropped.' And he said, 'What do you mean?' And I said, 'You've stopped losing body fat, and now you're actually losing elasticity of muscles' - I forget the exact medical term for it, but I said, 'You've gone beyond body fat, and now you're into actual muscle tissue and things are being affected. "And he turned - I wasn't sure how he was going to react - and he turned, and said, 'Cool'"

Cool?! Really?! I would have freaked the hell out and wondered if my butt would ever be the same again! Ironside went on to say that from that moment on, Bale began to put more and more weight on. He ran into him six months later and Bale had amassed 60 pounds of muscle in order to play Batman.