I WANT IT! RYNO Motors single-wheeled electric scooter is self-balancing, has a turning radius of zero when stopped, and only takes up about as much space as a folding bicycle -- so its conceivable that commuters could bring one onto a train
Moller Hover-car in production and selling. the machine can hover 10 feet off the ground and cruises at a speed of 50 mph. Because the is classified as a recreation device and not an aircraft, it is not subject to FAA regulations.