Buck, Buck...

This video is interesting because the mule isn't trying to get the rider off, just the britchin. I'm guessing this is the first time she's been ridden with it on.

Because of the way mules are put together, britchin is used even on saddle mules if you're riding in rough terrain. A back cinch alone won't hold the saddle in place on steep downslopes because mules have a different shoulder setup than horses.

I do wish the cowboy had evicted the dog from the round pen, though. I was worried it was going to get kicked.