Should've used his weight in a holocaust film
As an American G.I captured by the nazis and put in a concentration camp. Seriously, it would've been powerful, and realistic. Perfect opportunity for him to play a role, because I can't even think of an actor today to lose that much weight for a role, very rare and risky. I know he did a film called Rescue Dawn, which was okay.
Not saying The Machinist was bad or anything, but he didn't really show off his weight that much; that's what I really wanted to see, it seemed like he was covering up his weight.