Here's my logic / assumptions: How does the robot "know" (have sufficient model information to predict the response) that the board will hold it when it does a vault? It doesn't -- it is told to vault by placing one limb on top. As we've seen with self-driving cars, where the sensing is 99% of the problem, that's the barrier between a closed set and the real world.
Don't get me wrong. The fact that Atlas / Boston Dynamics is in a state where the sensing is _mostly_ what remains a problem is astounding.
Canada, Australia, New Zealand, and the Caribbean territories. Arguably Hong Kong.
You could also make a reasonable case for Egypt, Ghana, India/Pakistan... The withdrawal itself was peaceful and didn't leave the state in immediate civil war, even if it wasn't stable in the medium term.
It depends on which data points you pick.