Sometimes-- a lot of times-- Sirius had this habit of exaggerating every movement. He had a great deal of experience with it, as prone to dramatics as he was, and just at this moment he used said experience to roll his eyes in the most obvious manner possible to the point that even his head moved.

"I said sheep you idiot. You know, lambs? Those white wooly things you watch after with that staff of yours." Sirius gestured in front of him as if he was grasping a shepherd's crook. "Have you lost your brains because you were so busy getting intimate with your--"