Meet the Thrustcycle, a two-wheeled EV that relies on gyroscopes to stay upright and a flywheel for acceleration. If it ever becomes street legal, it’ll be like nothing else on the road — and it’ll never fall over.

At first glance, the Thrustcycle appears to defy gravity, balancing its 500 pounds on just two wheels. The secret to it remaining upright lies in a combination flywheel/gyroscope assembly located in the rear of the vehicle, which maintains lateral stability in direct proportion to opposing forces. Whether it’s sliding into a tight corner or getting hit by a car (or a foot, like in t...