 One of the exhilarating rides here at the fair, and that may be an understatement, is called the slingshot. Put simply, it's a reverse bungee jump. Now, we did think about doing it live on the air here. No, we did not. But then we got enough close look at it. You strap yourself in the chair, and you are slung about 250 feet into the air. You will go from zero to 100 miles an hour in one second. You'll pull about five Gs. The guy who...