Unidentified participants, costumed as characters from the 1978 comedy "National Lampoon's Animal House," ride through Golden Gate Park on their float, during the 97th running of the Bay to Breakers 12K footrace in San Francisco, Sunday, May 18, 2008. The 7.46-mile race, which attracts upwards of 60,000 participants, is well known for its wacky costumes -- and those who wear nothing at all. (Photo by D. Ross Cameron)