Don't get me wrong, it's a fantastic movie. It's just... it kind of fucked my mind when I saw it.
Same applies for Come and See. It's amazingly done, but it's brutal. Which is no surprise given the theme, but the difference is it's so naturalistic and shows all the wartime horrors. Most films tend to avoid these and show only the heroic parts of war.
Speaking of which I'd sneak in Apocalypse Now and Casualties of War.