Flight, and the perception of flight, are quite similar.
What is hang gliding but hanging in a harness beneath a great wing that carries your weight?
What is this thing but hanging in a harness beneath a wheeled frame that carries your weight?
The sensations would be almost identical without the risk of falling hundreds or even thousands of feet and killing yourself? In fact, this thing could probably mount a kite wing on the top of the frame and offer true lift-off capability when riding downhill. Control would be almost identical (though shifting your weight forward and back would be more difficult) and you wouldn't have to worry about stumbling and overturning when you land.
