Ever since Back to the Future II came out, everyone has wanted a hoverboard.   The idea of a floating skateboard inspired a generation of engineers, who have come out with some amazing, and completely viable options.  You will actually be amazed at just how close we are to these things!  Dennin, Bennin and I sit down and discuss the many variants, including powerful fans, maglev (magnetic levitation) technology, and small turbines, much like The Green Goblin!