There is an argument for believing that the entire process of writing a piece of fiction is simply a thinly-controlled and highly-internalised nervous breakdown designed, with a bit of luck, to produce something worthwhile at the end.
I don't like when you necessarily know that this is the end of the movie. I like when a movie ends abruptly. You go through this, and some of the scenes are uncomfortable, and some are funny - and then suddenly it's over.