17. Christian Bale
This list would be incomplete without mentioning Christian Bale’s ridiculous body transformation for his role in The Machinist. Who could ever imagine that Batman would drop over 60 lbs to become a 120 lbs skeleton of a man? To do justice to his role as a guilt-ridden character suffering from malnutrition, Christian Bale survived on a tuna can and an apple a day. Despite this being an exemplary body transformation, no one should copy such life-threatening diet.