Interesting idea but comically unsafe.
Lots of things from chain saws to hover mowers, or cars for that matter, are unsafe if not used with due regard for safety.
The one I was referring to was at Durham university, but it's not showing up via Google, so I guess it's no longer there.
It will come back with a vengeance: https://elevatorworld.com/article/a-paternoster-for-the-futu...