Mistress Madlen was pissed at the fact that she was not satisfied by this guy and she knew that she had to do something about it. That is why she went out of her way to facesit on this guy to both punish him as well as to have fun at his expense. He wished he had never met her as he was feeling pain and humiliation on a level he had never experienced.
When this guy belittled mistress Madlen, he did not know the kind of shit he had brought upon himself. He realized it when the mistress shocked him with her facesitting fetish. She did not care what he felt and had to make sure he never did that nonsense again. The guy was shocked at him how strong she was as well as how she choked him with her and farted on him for good measure.