[User8712]

How is it practical? It's a beautiful design, but far simpler designs can run circles around it in every scenario I can imagine. A small version might make for a fun desk toy. When I think practical, I think Boston Dynamics.

https://www.youtube.com/watch?v=ISznqY3kESI

https://www.youtube.com/watch?v=6b4ZZQkcNEo