As comfortable as it has been up until now, the tail coming up around him does have Childermass tensing up, albeit for only a short time. They're apart from the rest but not so far removed that he can ignore it. There's a furtive look given that direction, but inevitably...

Well, inevitably he just takes another drag from that damn cigarette and relaxes again, doing his best to put his usual preference for privacy away for now.

"Oh, I know," he says eventually, once he's pulled the cigarette away from his lips. The magician glances back, away from the lake. "Don't actually need to put much work into, either, knowing you."