The Roving Typist is a short documentary about C.D. Hermelin, "... a New York City-based writer who goes to city parks with his typewriter and writes stories for strangers."
He sits in parks and writes impromptu stories for passer-bys. It really makes you think about the interactions we have day to day with strangers, or if we're quite honest, the lack of interaction with our neighbors. Check out the video, or go find him in New York, but if you really want to get a story from him, you can order one at the Roving Typist.