It's like the shot of the Vette towing the mini-Vette, but more quirky.

The HM Vehicles Free-Way was a three-wheeled microcar from Minnesota, built for a couple years in the late ‘70s and early ‘80s. They only made 700 of them, but I think they could have sold some more if they'd marketed them as a heavy-duty towing vehicle.

(Hat tip to mdharrell!)