http://www.youtube.com/watch?v=w7Pye9f602s
It has been posted here many times, but always worthy of viewing again.
We host it on our site too http://ullrlabs.com/amber_seyler.html
Post-video tidbit - Sam Kavenaugh earned a bronze in 2012 paralympics - cycling team sprint. Here's his blog http://nolimbitations.com/Blog/?page_id=183