ISTR seeing Chris Meloni naked and pissing in a bucket in Oz. It has made watching SVU more interesting.
Also, Bjork reportedly got so into her role in Dancer in the Dark that when it was over she ate her costume. Weird chick (but an intense performance).
in particular, dropping down from a five-storey high clock tower with only two filmsy canopies to break the fall.
This… it is truly amazing the depths he went to. I read Bale ate ONLY a single apple and one can of tuna every day for 6 months. He also stated he regretted it and would never do it again.
Another - not nearly as crazy - transformation would be Ed Norton bulking up for American History X. He stated his body could not maintain that weight and that he filmed Fight Club just 6 months later and had lost all the muscle.
Correction Persis Khambatta did it first in the first Star Trek movie (and had a million dollar insurance policy in place in the event her hair never grew back!
Damn… beat to it… by over a year! 
All of this craziness recalls Dustin Hoffman running long distances to get himself into his character both physically and mentally for his role in Marathon Man. It was during a scene after one of the long runs that his co-star, Sir Laurence Olivier, turned to the method actor and asked, “Dear boy, wouldn’t it be easier to just act?”
Matthew McConaughey went from muscular in Magic Mike to scary skinny for The Dallas Buyers Club. There’s no way in hell I could ever diet like that.
