"Well, yes;" he explains, "he hexed me all the time. The laws of probability dictate that one or two had to get through occasionally." Whereas the whole point of... something.. is that Rodolphus never did break Severus's arm (being present when Sirius's hex made him trip doesn't count), even if in his less sane moments he'd thought he wouldn't mind. "You should tell Lucius about breaking his nose," he suggests cheerfully. "I expect he'll appreciate it."