Check this out:
http://www.motoracer.co.uk/VIDEOS/2006/videos%20feb/pneu.wmv
Nice, but have you seen the video where a wheels comes off so fast, it bounces for miles, then goes over a fence and smashed the crap out of a car windscreen? Doh 
The wheel fitter gets no pay that weekend…
Yes, I posted that one too! It’s in my collection. lol