A photo study in what NOT TO DO !!!!! LOL
If I were a "bettin' man" (which I'm not) I'd bet the axles and tires on that car trailer are overloaded, the rear axle on the fifth wheel is carrying more weight than the front axle (and we all know how close ST tires are to max) so it's probably overloaded also, and no doubt, he's over the GCWR on that U Haul van conversion..... Not to mention that there's no way to apply the trailer brakes on the fifth wheel....
Hmmmmm At least he's not overheating his truck transmission, gotta love ingenuity