Coherence (film)

Coherence is a movie which tells the story of eight friends who gather together to celebrate one of their birthdays. During the night, they experience strange things happening to them. They discover that their world has been split into two alternative realities, so they have to figure out how to survive in their new environment. In this movie, coherence refers to the idea that reality can be split into two separate realities and the characters have to figure out which one is the real one.