Jarhead
I am becoming a great fan of Sam Mendes. All the three movies he has made are excellent, especially this one and American Beauty. This is a sort of tribute to great war movies like Apocalypse Now (It even has a scene from that movie). There are a lot of funny scenes, but they end in a shocking manner. This technique is employed throughout the movie to grab the attention of the viewer repeatedly. And along the lines of Apocalypse Now, this movie is about madness associated with war and not about war itself. A great movie. Don't miss it.