Similar: Before the era of OSHA - something I used to see locally was hay bale tossers made from differentials. The operator sat up on a seat like a backhoe. A laborer on the ground would set hooks on a bale, the operator would stomp on a brake remaining on one end of the differential, and a cable wound around the other end would toss the bale up on the haywagon for a laborer there to stack neatly. Fun to watch, and obviously the operator needed great skill to use this efficiently and safely.
Does anyone have a photo of one of these?