This may be a prank, a Jackass-ready bit of public performance with Spike Jonze or some other relative youngster dressed up in old-age makeup trying to make everyone around uncomfortable with such youthful limber moves. But what if it’s not? What if this really is some old coot with incredible hips that never age, a kind of eternal, perpetual hip movement machine engineered by scientists with a little help from Nordic gods? What THEN!? What, indeed. We don’t have an answer for that, either.