This is Michael Hedges playing "Aerial Boundaries" live on some TV show. The thing to keep in mind here, beyond the innovative technique, etc (he first wrote this in the early 80s, I believe) is that this is just him playing. No backing track. No other musicians. He is making all of those sounds come out of his guitar all by himself and all at once
(Edit - oops on the typo in the title, and who knew this would turn into an automatic YouTube link? I been gone too long!)