The Boston Dynamics (now owned by Google I think) robots are impressive inverted pendulums. (After that, they are fork lifts.)

Snarky of me – probably. So I want to quickly say that these are truly impressive, especially the elegant mechanics.

But the core technology is do it yourself:

Which may only increase chap’s unease.

(Also, I think that inverted pendulums have been used to keep super tall buildings from swaying. Can’t track that down however.)