Wanna talk about an actor drastically changing... How bout Ed Norton in American History X , he was huge in that movie compared to his normal crackhead self. I think I remember Arnold interviewed him and asked him how he gained so much mass for the movie and he said hard work and diet, but why would any actor tell anyone their personal business...I know if I was a successful actor I wouldnt want anyone to know I was juicing, that could damage their reputation in hollywood.