I'm sure there are better options than these, but they're the first two that I thought of 1. Rosemary's Baby. All the build up and anticipation, and then you get that chilling ending. Just wonderfully done. 2. Strangers on a Train. I mean you have Alfred Hitchcock, master of suspense, how could you go wrong? The last 15 minutes made me realize what "on the edge of your seat" really means when watching movies. I was practically hyperventilating, it was so perfect.
I Think THere is no such thing called best ending, cause end never be good , People want things that everlasting , string with great hope and being with them forever, then they can dump theirself in even considered without a breath. But the most amazing was, ending breaks men and women 's heart which indirectly provokes us to fix each other, to console each other, then we made a better life.