Inception

You're waiting for a train; a train that will take you far away. You know where you hope this train will take you, but you can't be sure. Yet it doesn't matter - because we'll be together. 

~Mal

I miss you more than I can bear, but we had our time together. I have to let you go. 

~Cobb

Argh, Cobb's guilt. I cried when the scene showed he had indeed kept his promise to grow old together with Mal, and then he finally decided to let her go... :(

And I stayed till the end of the credits, but what's supposed to be there isn't! Grr...