In the Parelli world, it was when you increased the energy, when horse was not responding to what you were asking, there just wiggling the rope itself, so next was hitting the rope so it wiggles more and the hitting scares the horse into backing.
Never made sense, having a confused horse trying to figure what you want and, rather than figuring another way and in small increments how to ask, until horse understands, just go beating around harder until horse reacts, hopefully the way you want, there backing up swiftly.
If done very carefully, and starting very slow, maybe some horses catch on.
Have seen others dragging Pat or his instructors on the end of the lead rope along for the ride.
Any time training becomes wild and horse is learning to resist, is a negative in any training.
As our riding instructor used to say, “we can teach a horse to do anything we want if we explain to the horse what we want when we use any cue, even to back when pulling on it’s tail while mounted”.
Yes, he was being absurd and funny — and right.
You can teach anything to a horse, but think before you do if it makes sense and if there is a better way to do what you are after?
That last step, to consider your options to what you want first, is what some seem to be missing in horse training.