Hm? The same as anyone else, I think? It just sort of happened-...

[he trails off when he hears about Hanako telling Crow to jump off a building. Sure they were in the Dream Sphere and Keiwa understood that at, at the very least, fall damage was just a concept there but...]

I know it's just a dream, but you never know what might happen. So you should try and be little more careful in the Dream Sphere.

... Even if Hanako-kun is an experienced Dreamer. [and probably not much older than Cooro himself]