-electromagnets on a magnetized road -)skatepark -))disadvantage - higher initial cost -))advantage - low end user cost -hovercraft drive fans, small 2-stroke motors, like RC car -)with a skirt -))disadvantage - limited terrain -))no height control -))viable technology -hydroboard, like the jet pack -viable -but has been done -could do something with an autonomous jetski source -quad copter design, similar to existing drones -coupled to a magnetic board underneath -)can we generate a strong enough field? -)control challenges? -)phone and wallet issues? -)energy -track in an arena, powered by rail gun -materials acting with hydrogen, has to reach freezing temp