This is an older video (few years ago) of myself riding a Quarter Horse gelding named Poncho. The video is kind of dark, and I apologize for that; There were no lights in the arena, so I put my camera on the wall next to the gate.
I would appreciate critiques of all kinds, and constructive criticism. I no longer ride Poncho, so any advice with him will be "useless" :).
I found out after further investigation into his stumbling that his hooves were at different angles, and after many requests to the owner to have his hooves trimmed, I stopped riding him. So, stumbling is a balance/hoof issue mostly, as far as I can tell now.