This is The Halfbike

Taking the core driving mechanism of a classical bicycle but redesigned pretty much everything else produced a vehicle that trains your balance and reflexes in a new way. Not only on a physical level but it also affects the way you perceive movement and enhances your senses. The standing rider position is essential for the Halfbike. It brings you closer to natural walking and it?s the only way to control the vehicle with your whole body and not just your hands. Halfbike is a sort of an extension to the body that allows a smooth and intuitive ride.

Video by halfbikes.com