The scene in the Hospital
The scene in the hospital when Christian visits Captain Hardenberg is one of the most powerful things i have ever seen, and Brando is particularly amazing, the anguish and horror he feels to see his captain whose face has been destroyed-no eyes , nose jaw, his face one huge bandage, the pacing , the way the scene is shot, particularly when the captain asks him to bring him the Bayonet:" oh its not fro me its for him," then the captain walks over to show Chrsitian a man even worse wounded then him-Brando's reaction to all this horror sells the scene perfectly.
There is a transformation of Brando's character in this scene, he loses the pretended soldiers hardness, and becomes a human being again, its as though he was trained and drilled to think a certain way and suddenly all that melts away. He loved and hated Captain Hardenberg-and is the suffering of Hardenberg who has is now blind that allows Christian to see.