Most of us have heard this paryticulat cue/aid given to us by our trainers. We do what we think the coach wants and sometimes it works and sometime it doesn't. Of course if it doesn't work some will simply revert to a voice command of "whoa" or "easy" but the problem with that is that it does not do what the half halt was meant to do.
So why is that.
So lets hear what you think the PHYSICAL effects are supposed to be on the horse's body so they can comply with what you are asking from them.