Several folks jumped on my one belled mule for Old Bear which is broke only for packing.
Don't you just love it when you learn something new each day?
My first rides as a little snot was on Grandpa's razorback mules. We would lure them into the barn, get a rope over their neck and stand on a 5 gallon bucket to bridle them. It was bareback 2 and 3 cousins per mule. If one can imagine sitting on the edge of a 2x4 you have it. The mules were patient, several years went by before we found out they had never been trained to ride. Just pull implements.
I can see that happening.

When I was about twelve my Grandpa farmed just about every vacant lot in North Topeka. He always had a couple teams of Belgians and one of them was a pretty buckskin color. I asked him one day, "Grandpa can I ride that horse?" He told me, "I have no idea, but you're sure able to try."
Was like a extra wide rocking chair.