[Final Authority]

Does the plane fall or will you argue that it will remain aloft? 'nuff said.

[discostu]

Red herring question. The Segway locks up potentially throwing the driver from the vehicle. A plane will glide giving the pilot an opportunity to land or bail, a car wil coast giving the driver a chance to pull over and stop. That's the difference: planes run out of fuel in a way that gives an opportunity for safe recovery, Segways do not. Also planes require many hours of training before one is allowed to fly them, a Segway is supposedly usable right out of the box.