Frankly, if the thing is that untested, I'm not sure that I'd want to have the developers or the audience that close to it without shielding. And it should have a remote E-stop switch (though maybe it did here, and that's why it froze up).

You know those Boston Dynamics videos? Unless the stuff is pretty mature, they've got those protective walls or are interacting with the robots with hockey sticks.

Ex:

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

EDIT: Actually, looking at the Russian video again, I think that the AIdol people don't have a remote E-stop button and were instead fumbling around with one built onto its back there, since that's when it stopped moving.