"Or a prehistoric sea creature..." He snerks, however hard he tries not to.
He nods. "It hasn't happened when you weren't trying to sleep, though?"
Severus gives him a why are you looking at your glass like that; are you seeing pink elephants or something? look back: not innocent, exactly, but a bit quizzical.
"Relax," Severus says calmly, "but don't look like you're relaxing. The spell has us covered, and they'll be assuming you're trying to talk me down from that ridiculous figure from earlier. And what I expect is a modicum of cunning from anyone who tries to pull something like this! Penguins, I tell you!" he adds, raising his voice and looking outraged again, mostly for fun. "At least then they'd look like gentlemen!"
Heheheheheh. :D Well, the lack of dementor toxins and the lifted imminent threat of maybe having to kill someone at any moment helps. ;)