"'Old man?'" Snape sniffed. "You're not too old for a damn good spanking."
Snape smirked. "That'll be splendid. You'll actually come in useful for once in your life. However belatedly."
He leaned back against the wall. He was actually nattering, in a way, with Sirius. So far, neither wands, nor voices, nor even tempers had been raised.
"I suppose this," Snape gestured vaguely at the lack of mayhem, "is some kind of record."