I have seen the underside of my horses a couple of times. It was not intentional and I do not care to repeat it. Both were accidental. The first incident the mare successfully missed me. The second time, and a different horse, I got trampled. 8 week recovery and I was lucky for only that.
Our horses stand beautifully but when I tie I use those blocker tie rings or just do one loop over the rail. A few years ago we had a very gentle gelding jump back, popped a rail and took it back with him a few feet. If something happens I want the horse to have enough rope to not panic. I had a good friend seriously injured when she was grooming her horse on cross-ties. She is an experienced horsewoman and it was not his first time on the ties.
With horses anything can happen at any time. I try to do all I can to increase the chances of survival...especially mine.
If you ever find yourself in a fair fight, it's because your tactics suck. ~ Marine 1SGT J. Reifinger