I've just stumbled across this and found it pretty interesting.
[video=youtube_share;CBKJxxWz3qw]http://youtu.be/CBKJxxWz3qw[/video]
http://youtu.be/CBKJxxWz3qw
[video=youtube_share;CBKJxxWz3qw]http://youtu.be/CBKJxxWz3qw[/video]
http://youtu.be/CBKJxxWz3qw