The minute or so starting at 5m40s in this video is apropos: http://video.google.com/videoplay?docid=5935911405946587342 http://video.google.com/videoplay?doci

The minute or so starting at 5m40s in this video is apropos: http://video.google.com/videoplay?docid=5935911405946587342 http://video.google.com/videoplay?docid=5935911405946587342 (You may be interested in the rest of the video as well. It's a fascinating show.)