Do drivers in the USA have to yield to alien UFO's? - eviltoast

If I am driving on a road, and a flying saucer with a spotlight is hovering ahead waiting to land, do I have to stop in the roadway and yield to them? Or do they have to yield to cars in the road? I checked my states driving manual and they don’t mention alien air/spacecraft at all.

I would guess that the UFO would have the right of way, as traffic would have to eventually stop for them anyways. Should I just stop in the roadway and put my hazards on so the flying saucer pilot is aware I am yielding the right of way to them?