Over the weekend, Craig Dietz swam with friend John Mix of FINIS at the Sharkfest Swim from Alcatraz Island to Aquatic Park in San Francisco Bay. "It was the craziest swim I've ever done," recalled the Limbless Waterman. "As if the 6-foot plunge off the ferry to start the swim and the 56ºF (13ºC) wasn't enough. The ebb tide getting into Aquatic Park was