Tonight's show is for the latent gear-head in all of us. Do you swoon over tricked-out speedsters? Does horsepower get you hot? Are you a heterosexual male who purchased ""The Fast and the Furious"" on DVD? If you answered yes to any of these questions, you do not want to miss tonight's ""Unscrewed."" We'll talk to an earthquake tracker who practices his predictive science with the help of one seriously stocked SUV. Then we'll offer a titillating taste of the erotic world of Gas Pedal Fetishists. Finally, we'll feature a fabulous new Girl Gone Wired who is guaranteed to get your motor running. Enjoy the ride!