Except it doesn't quite close, not until a beat or two after the nurse's back is turned. And when it closes behind her, she's back inside and hurrying for cover.

She doesn't know the ins and outs of this place, but she knows what kind of thing to look for: back stairways, closets, wall accesses. If there are eyes everywhere, very well; she's evaded eyes before.

And she won't be leaving the hospital without at least finding some trace of the people who have gone in and haven't come out.