^^That's one reason why I don't
go to trail rides with folks I don't know. I've seen way too many times of someone having a horse start bucking, buck them off, and then proceed to buck into the side of a truck/trailer or into a group of people/horses who aren't mounted yet....or buck into a horse that's tied
I had one that bucked into my horse after
I was mounted but when I was still standing around waiting for everyone else. Thankfully my horse was bigger and stronger and didn't get hurt. If he'd gotten crippled by that idiot's horse, there would have been hell to pay.