Nie Mingjue had no clue what a parking brake was. That? It goes straight over his head. Though, he does pay attention to what Kinn is doing as well as where the man was standing. There was, after all, a reason that the horse wasn't budging from where it was at.

"Don't stand in front of him. If you're going to lead him then stand at his left side, not too close, but near his head or between his head and shoulders. In that position? He will know where you're at at all times. Also, make sure that your lead is not coiled or on the ground."