All I needed to see is that he installed a nice "pry-bar" for the extension on his hitch. There is a whole lot of undulating-in-road as you travel along highways. And, the vertical force created by the tongue weight is being multipled(up and down) by way of this "prybar", and it's only a matter of time before "the weakest link in the chain" FAILS. THEN, when I saw the precarious perch of the ATV in the rear, all I could think is that he's got himself a very strong guardian angel (in his mind).
All I can do is NOT drive behind trucks and trailers.