It’s seen toward the beginning of the Clint Eastwood movie “Hang ‘em High.” A wagon, a jail on wheels, a paddy wagon, that carries Eastwood and other prisoners to incarceration at Fort Grant. In fact, such wagons existed—called tumbleweed wagons—and they were used in various parts of the West.
Supposedly, they got the name because they rolled around the prairie, picking up all sorts of things along the way.