We don't do anything at all. I'll have to set you down a moment, Clara.

[ She can't hold herself upright, he knows, but he won't be any good against the things that come through the door if he's only got use of the one hand. So he carefully puts Clara down in the corner, seated as comfortably as he can get her. And then he puts himself bodily between her and the door. ]

If they don't come through, we're golden, of course. If they do, they won't get past me.