I've long been a fan of Harry Nillson. He also paled around with John Lennon in Lennons' wilder days.
The title of this doc. reminds me of a film my late father took me to see years ago called "Who Is Harry Kellerman and Why Is He Saying Those Terrible Things About Me?" which left me amazed and uncertain of what I had just viewed on the big screen. A flawed experiment for Dustin Hoffman for certain.
Harry Nillson was certainly a unique talent
http://www.imdb.com/title/tt0067980/