Mistress Khali did not want to let anyone piss her off and that is why she chose to choke this one to teach him never to piss her off or to mess with her. That is why she chose to trample him hard and she also choked him with her smelly sneakers. He was shocked and he cried at what she did to him but he never messed with her again.
Mistress Khali felt that she needed to have her slave behave and so she used hard femdom to dominate him and to teach him what she wanted him to do and how to do it. The pain did most of the work for her as he did not want to feel it again so he had to act accordingly so as to avoid being punished again by the angry mistress.