Well, it's not a vorpal blade, at least. He isn't quite sure if that makes a difference, but he has to look for a silver lining where he can. Does she know how important it is that he not be killed in dreams? No, that's right, she doesn't know anything about that, or about his dream related abilities in general. He stops all his lashing and teakettle hissing and goes very still, hanging his head in a glarey sulk instead.

You're right. What could I possibly have been thinking? My ability to reason suffers so much, in dreams.