I figured it was him warming the tire - even though I know he's got tire warmers and uses them right up to the moment when he goes to the front of the line. Listen and you'll hear the engine revving and it sounds like it's under load. The crew member holds the bike while he burns out, then lets go and Bill left instantly. Maybe I'm wrong, maybe not. If Bill ever gets done doing all of the morning talk shows and radio and newspaper reporters -- maybe he'll get back on line and tell us.
As for making the link(s) into stickies -- well, sure, I could do that. I'd put both that I've seen -- him leaving the line (tire smoke or engine oil) and also the helmet camera. I'll wait to make sure I've got the URLs correct. If there's another video - please send the information on that/them to me, too.