Darren Tedder lives the type of life normally reserved for the pages of an adventure novel. An underwater cinematographer by trade, the Social Circle resident spends his free time cave diving and working on his two classic racecars. Later this month, Tedder, 42, will compete against seven other racers for a $25,000 grand prize at the DynoMax Power to the Wheels Dyno Tour at the 2007 SEMA Show in Las Vegas.