A friend sent me an email with a clip of these guys in action. The image that stays with me still, is of Ricky Hoyt crossing the finish line, arm raised to the crowd, ecstatic with achievement and triumph - and it still strikes me that it was one of the most humble things I've ever seen! Anyway - enough from me. Watch for yourself!
** Seems I can't get the link to work properly - cut and paste the address into your browser and it will take you there!