Poll: Saddest movie endings ...

The original word I was going to use was 'unhappy' but then I realized that it doesn't necessary take a pessimistic or dark ending to break your heart. Still, this is not a list of movies that end happily but those who never fail to make your eyes water before the ending credits start. Totally depressing, brutally shocking or emotionnally involving, with a thin or inexistent light of hope, which of these movies has, in your opinion, the saddest ending? Discuss here