You can find a video on youtube where his stallion is 'asked' to rear up. But in doing so when coming down, the stallion literally almost bites off his head.......
A couple months later he had announced he is not riding his horses anymore (not even for the fifteen minutes as he has preached about before), due to the pain and strain it puts on the horse's back.
I personally believe he stopped riding not because the horses were in 'pain'. But simply because they have become too dangerous for him to handle since he disagrees in any disipline action toward them for dangerous behavior.....