Hvis du ikke kan se denne video, understøtter din browser ikke HTML5-videoer
For at se denne video skal du aktivere JavaScript og overveje at opgradere til en webbrowser, dersupports HTML5 video
Lloyd Pye's most popular video despite poor visual quality. Audio and slides keep viewers riveted through two hours. Millions of views on other sites. We are seeking better versions of the same lecture to post here. Stay tuned.