I've mucked out a pen or twenty, the ammonia (pre-biochar) in my nose, and a manure fork through a finger. Still kickin'. I think I am qualified to comment.
"You load sixteen tons, and what do you get ..."
Sing it real slow, to the rhythm of the muck-stick.
Story like this gets better after being told a few times. Or maybe it's just a tiny ad:
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars