mm wrote:
U-haul says for ttrailer rental:

Must be equipped with a hard top if it is an SUV or Jeep. U-Haul does
not allow any type of sport-utility vehicle not equipped with a hard
top to tow U-Haul equipment.

How come?
Hmmm,
Have ever seen an accident towed vehicle came on top of towing one when
hitch unhooked during accident? Or have seen a runaway trailer running
ahead of towing vehicle?