Amazing six-minute video short about time travel, called Therefore I Am. Starts out a little cheesy, then messes up your mind in the style of Primer or Looper. The description: A mysterious encounter between a man who claims to be from the future and the man that he claims is his former self. A surreal psychological thriller about loss and regret. All set within the framework of a time travel story that loosely operates in accordance to the paradox-less MWI (many-worlds interpretation) in quantum mechanics.