Like exotic birds conducting an elaborate mating ritual, the motorcycle racers in Biker Boyz huff and preen in their Day-Glo leather outfits, trading tough-guy stares with each other and sultry ones with the cleavage-baring babes in the crowd. It all amounts to one of the silliest movies around, a laughable piece of posturing that makes The Fast and the Furious look like a model of restraint.