I believe this was shot on an i-phone. I thoroughly enjoyed it."UNSANE" from Director Steven Soderbergh. It's a psychological horror film. It was really disturbing and very much a Horror film, which is surprising for Soderbergh. A young woman moves to another city because she's being stalked. She tells her story to a sympathetic therapist who just has her fill out some routine paperwork. She didn't realize she was self committing to a psych ward. She hits someone and it turns into a week stay. Don't want to give any spoilers, intense film.