This was part of my HORSE FAIL post, but it was too good not to repeat. It's one of my infamous animations (with four or five frames, so it ain't Disney). Apparently this is a "thing", something they do down Argentina way to rehabilitate stallions:
From the Daily Mail:
The exercise of horse yoga is practiced at the Doma India School in San Luis, Argentina with the aim of taming and relaxing wild, traumatised and nervous horses.
The school was founded by father and son Oscar and Cristobal Scarpati and they live on a farm in the South American country.
If I were a stallion, this wouldn't relax me, but that's just me.