It’s nice to know that I’m not the only person to have a horse jump in harness. A couple of years ago, I was trying to train my Hackney pony, Crackers, to walk through a puddle if I asked him to, instead of skittering around it to avoid the monsters lurking therein. Of course, if he encounted a puddle in his pasture, he would slog right through it, but heaven forbid he do it under harness.
I found a good shallow puddle after a rain, and made several attempts to get him to walk through it. We circled endlessly. He finally seemed to accept the concept, and was going right for it, and jumped the darned thing. It was embarrassing as of course one of my neighbors witnessed it.
I eventually got him to go through puddles, but never forgot that day.
Rebecca