Hm, this movie sounds alot like the book, if none of you has read it, here's a summary:
Billy Halleck was satisfied with his normal, routine life. He enjoyed his family, his job as an attorney, but he was not so happy with his weight. All of that changed the day he accidently killed someone with his car. Since that day, he has lost weight. His colleagues have changed as well but not in the same ways. They have suffered body mutations. Halleck puts the pieces of the puzzle together but wonders if he is a little too late. He has been cursed by a gypsy and it had to do with the accidental death.
I loved the book, so I might love this movie!
The Gambler X-Stud United States Marine "Live fast. Die young. Save yourself."