How interesting, that is the exact reason we teach ours to canter, in case they are spooked. You are the only other person who has ever brought that up. In my mind it makes total sense. What will happen when your horse gets spooked and runs, I believe in most cases the horse will then become more spooked by the bouncing cart and things will snowball from there. This is why we teach our s that running is not scary, but make sure they also know I control the brakes. If you'll notice in the video, when I say easssssssy she backs right down. I've never had to put the plan into action with any of our horse/donkeys but I would hope if they ever were spooked and ran they would trust me, that slowing down is safe. Just my .02 worth.