He was dismissing him? The bloody watchwizard in the atrium assumed he was somehow important enough to be dismissing him? It was almost enough to make Rodolphus forget where he was entirely, and the dark look that crossed his expression - the sudden, hungry sort of flash in his eyes - spoke volumes of that in the moment where the idea was so tangible that he almost couldn't stop himself from reaching for it.
But Rodolphus had more willpower than that, at least. Of those that had suffered in Azkaban, he had come away colder, but not as much addled by the time and the cold as others - his wife, his brother - had. So the urge was there, and almost unstoppable, for a minute, and then he was able to bite it back. For now.
He looked Munch over before he stalked away, though. He would plan out something that would be suitable to teach the man his place.