No commentary, but I believe that this was shot with a remote controlled quadracopter with a camera attached. And from personal experience, they can be tricky to maneuver and get the shot that you want; this pilot is top notch.
Aided by a rather expensive gimbal mount.... Seen here
[video:youtube]
http://www.youtube.com/watch?v=J7-wX4lQdx8&feature=youtube_gdata_player[/video]
