"It was pretty brutal... My wife was pregnant at the time and I had more symptoms of a pregnant woman than she did. I was moody and hungry all the time. I understood addiction for the first time, to be honest. I immediately knew what it is like to be truly at the mercy of something. Literally, food was the last thing I thought about before I went to bed and the first thing I thought about when I woke up." Chris Hemsworth on the crash diet he adopted to get into shape as Formula 1 race ace James Hunt in Rush.