Funny, that we have always used the haven't-gotten-there-yet knuckle-walkers as the archetypal model, when we might in fact, be looking at the end-result devolution of a separate line.
Great Idea! ... If you get TIRED of the POTHOLE .... Get IN the POTHOLE ... Put your CAR on your BACK .... and let the TRAFFIC pass smoothly OVER you BOTH !! ..... ;-)