No, you can’t go buy one today but it is pretty interesting. Shane Chen, inventor of the Hovertrax hoverboard has a 2-wheeled, 5-passenger car on the drawing board.
Is it possible? Sure. Before you ever saw a Segway you probably didn’t think it was possible either. It balances by moving the passenger compartment forward and back in order to keep the center of gravity over the wheels.
Check out the info — including an animated video — on New Atlas