Not sure why it'd be handy, but it's cool nonetheless.
http://www.youtube.com/watch?v=qE_rDay9RJ8
http://forum.ppcgeeks.com/showthread.php?t=114050
http://www.youtube.com/watch?v=qE_rDay9RJ8
http://forum.ppcgeeks.com/showthread.php?t=114050