Lady J wore her high heels and she used them to dominate as well as humiliate. She wanted this slave to know that she would not let him get away with messing with her. That is why she opted to tell him what she could do with her high heels. He was scared and he nearly cried as she did her thing. He knew never to piss her off again.
Lady J likes to use the element of surprise when punishing people. That is what she used today when she had to punish this guy who had wronged her. She did not care what the guy felt and she knew that it was important for her to trample and dominate the guy. So she went out of her way to use her high heels to do it and do it in a crazy and cruel manner.