"Oh. That..." Aziraphale gives a slightly nervous smile, the one that means that he doesn't know the actual answer, but is going to try to talk his way through it, anyway. "That's not actually my doing. I didn't bother practicing any animal tricks..."

Not since Warlock's birthday party, in which he had to resurrect the dove stuffed up his sleeve. He still feels bad about that, actually.

"I mean, you can't possibly think I'd purposefully pull our host out of a hat. Or Moloch. No, there's some sort of Nexus magic at work..." He looks at Crowley in concern, running a gentle hand down his side. "Must be the same thing that's turning people into animals... are you feeling all right, dear? Any urge to go snake-y?"