Nocturnal Animals
Susan (Amy Adams) left her husband, Edward (Jake Gyllenhaal) because she hated his writing career. He sends her a copy of her new book and she gets caught up in the story, which is shown to the viewer. It was basically a love letter to her and she was so convinced to get back with him that she decided to meet up with him for dinner. In the end, he stood her up and was playing her all along.
Primer
Aaron and Abe accidentally create a time machine that creates overlapping timelines. The new versions of themselves are able to cause some significant damage to the space-time continuum. Aaron works with his former self to recreate the time machine to make it better, while Abe tries to prevent his former self to learn about it at all. They were never on the same page!