I wasn't the one in danger, but I was directly involved. When i was a kid, some friends and I were allowed to mess around with these two minis. I had the smaller one pretty well trained, he had a great brain and was pretty much bomb proof. I taught him to drive and pull among other things. The other pony was larger ,hotter, and fairly spooky. We wanted to try teaching her to drive too. We knew we had to take it slower with her, so the girl who primarily worked with her and I had been taking it slow. Getting her used to long lines and ground driving, desensitizating ,ect. She was doing great . One weekend the primary girl was away, so I enlisted another one to helo work with the pony. I wanted to start getting her used to noisy things dragging . I pull out bombproof pony, hook him up to a piece of fake tree(lots of noise) and lead him around the arena with the other girl leading the spooky pony behind us(so 'chasing' the scary item). Spooky is doing pretty well, has a few moments but overall is doing great. All I wanted is a quiet walk. Now, this little mare was a great jumper . That's what was primarily done with her, in hand jumping. She could jump pretty high too. So as I'm leading the bombproof pony, I look back to see how spooky is doing. The girl leading her has brought her closer to the drag, pony is behaving but not relaxed . Then, before I could react, the girl steps over the drag, presumably intending to put it between her and the pony to get pony even closer. What does pony do? Pony tries to jump the drag. Gets her leg caught in one of the lines connecting the drag to other pony . The loud drag jerks under her, scaring the **** out of her, sending her flying into the other girl. She's much bigger than the other pony and pulls him over backwards, now tangled up in the lines, drag, and the other girl. Spooky falls over at one point , everyone is in a heap. Legs are flailing and kicking trying to get free and standing . Girl is on the bottom of the pile. I was ready to call the ambulance when finally spooky gets to her feet and stops flailing , still partly tangled. Bombproof pony is tangled up and stuck down(still as a statue, perfect pony). Girls pulls herself out and stands up. She got a brusised leg and a couple cuts and scrapes across her stomach(presumably from kicking feet) but otherwise fine. We got the ponies freed. They were unharmed. I was so mad. All our work with her ruined. We gave up teaching spooky to drive after that. She was fried and it wasn't worth it. Other pony was no worse for wear and drove no problem after .