I saw this video:
My horse is very calm, docile, and broke at 11 years old (part draft horse, part arabian), so I know I won't see this behavior from her, but I'm still curious what this supposed expert did wrong. I want to avoid doing whatever he did at all costs forever and ever in my horseriding life! And I'd like to learn as much as I can about horse behavior and body language.
It looks like he pushed the horse too far, too fast. I'm guessing he should have done more "get the feet moving" stuff before sacking out. He wasn't paying attention to the pinned ears for sure. But is there something else I'm not seeing? Is it true that there are some psychotic horses out there that can't be trained?
I'm only looking at this from an "understanding horse mentality" perspective. I do NOT plan on ever being around a horse like this in a round pen, so please don't warn me against it. My sharply honed instincts of survival serve me well.