Looks like he's gone full-on sad Keanu. Which is too bad, I'd be a lot happier if I had one of those cameras. That thing has some really incredible reach. I wonder how it's controlled and how they make sure it doesn't collide with the actors?
They likely don't make sure it doesn't collide with anyone. There MAY be some local safety systems in place, like virtual light curtains and exclusion zones...
If you're filming a kung foo scene, you're already very careful to not collide with who you're "fighting". I don't see how this would be any different other than the robot is perfect and your opposing actor is not.
Your opposing human actor is not 2000kg and moving at 4+ m/s...