Colin Furze did it a year ago. https://youtu.be/gSDtNkKPiDg
And wires with counter weights have been used in movies since forever.
This is something a performer could take pretty much anywhere. Versus a massive 40 foot long crane or complicated wire setup, this is a big improvement.
Rotation around the vertical axis has too much friction. It should be designed such that his motion around this axis doesn't bleed away so fast.
I can't imagine why it would not just run of that plate after a trivial amount of movement.
It does look like it would be pretty easy to make with just some bent metal and exercise weights. Colin Furze's one worked well too, maybe this 'invention' was influenced by his. There are many of these on youtube, some years old.
everybody's gangsta until you jump over the central axis
Man, this is cool. I don't think it's exactly like a lower gravity environment (the counter-force to gravity exerted by the counterweight will never be linear - the "gravitational" force will change with the pivoting angle of the counterweight).
Can someone speculate on/explain this curvature? Is it just parabolic?
Let's club together to buy Dang one of these for his birthday?
This could do wonder for medical rehab / training too.
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NASA has a much lower tech solution at Cape Kennedy: it's a wall that is slightly off vertical. You are strapped into a harness and lifted off the ground so your body is horizontal and your feet rest on the wall. The angles are calculated so the force of your feet against the wall is the same as the gravity on the moon, while the strictly vertical component of your weight is supported by the harness. The net effect is that walking and jumping on the wall is the same as walking or jumping on the moon.