This loser was not in the frame of mind to do what he had been told to do. But instead of saying he was not able and asking for more time, he did the work and he did a shoddy job. She was surprised when she saw the kind of work he had done. She was pissed and she punished him cruelly by trampling on him and cruelly making him endure it all.
Miss Lou is the kind of mistress who likes to be obeyed at all costs. She does not like to be questioned and anyone who does only invites trouble for himself. This loser did and he lived to regret it. She crushed him and trampled him with her feet. She was pissed and she forced him to endure the trampling from her head to all other parts of his body.
This mistress could not believe what her slave had told her. She was pissed when she learned that he had lied to her and had not done what she had told him to do. He had confidently told her he had done what needed to be done yet it was not true. So she punished him cruelly for it by trampling him as cruelly as she could and he had no choice but to endure the pain.