Go out and watch it. Great movie, his weight is a little distracting. You will gasp or look on in shock more than a few times throughout the movie. He looks like a concentration camp victim. His looks aside it was a really good movie. **edited** I agree with you sleepy
Here are a couple of pictures of him from the movie:
A little about the plot: THE MACHINIST is the story of Trevor Reznik, a machinist who hasn’t slept in over a year. Working in a machine shop, Trevor faces the usual occupational hazards, yet his extreme fatigue only makes them worse, causing him to accidentally cut off a co-worker’s hand. What Trevor suffers from clearly isn’t a typical case of insomnia… (<---taken from amazon.com)