The slave knows Mistress Margo really well, he knows that he can't joke around when she is there to punish him and he better makes everything she ask, because if not, then she will become a monster and drags him down to hell by pain. So he tries to cooperate when Margo brings in her hard cane and starts the punishment, but it's very hard, because the pain is intense and he feels like he must run away from her.