Best Ambiguous Ending?

Looking to hear thoughts on some great ambiguous endings that made you ponder said movie after you were finished watching and how that ending made you feel. For example, in Prisoners when Hugh Jackedman is left in the ditch under the car with the red whistle. Did he ever get found by detective Loki? Left there to die while his family moves on without him? This is my favorite ending to a movie because it doesn't necessarily wrap up everything into a neat little bow, but let's the viewer question what he or she believes happened. Let me hear some good ones

Submitted November 10, 2016 at 06:28AM by Thorshamher https://www.reddit.com/r/movies/comments/5c4ipr/best_ambiguous_ending/?utm_source=ifttt