Hopefully the film answers that, ... It opens that can of worms, where people walk out and say, 'Wow, I can see why it would be hard for him to function again after that.'
The last thing I wanted to do was mimic him. I wanted to get his essence. It was the hardest thing I ever did on film.
That technical stuff is really practice. It's not some magical thing. It's hard work, like an athlete, in a way. You just have to practice how to embody this character. If I'm playing a character who isn't like I am, it can take months and months.