Aziraphale had anticipated that something like this would happen, so he has his hands out to catch him, and steadies him once more. "That's it! But yes, you've got to watch out. If you get distracted flying, you'll fall."

It's sort of dangerous in that way, as swimming is. He hopes Wei Wuxian knows how to swim.

"Let's stay very low for now," he says. "And you can transform into a bird to practice, in case I'm not around, and a friend can catch you if you fall!"