A tow truck towing a tow truck towing a tow truck towing a tow truck. Which raises a deeper philosophical question of just far this could go on and whether could there be an infinite regress—a never ending loop of tow trucks with no first tow truck. And also, how many tow trucks could a tow truck tow if a tow truck could tow tow trucks?
Thanks to Amanda for the picture and Julie for the tongue twister!
It’s been noted that these are technically tractor trucks rather than tow trucks. Functionally they are trucks that are towing other trucks (except, I guess, the last one) so that makes them tow trucks in a sense!