The first part of this video got me thinking....
[video=youtube;UnQV8gbTKyk]http://www.youtube.com/watch?v=UnQV8gbTKyk&feature=player_embedded#![/video]
[video=youtube;UnQV8gbTKyk]http://www.youtube.com/watch?v=UnQV8gbTKyk&feature=player_embedded#![/video]