There's a trail of the liquid on the floor showing exactly where the pair have been. Morgana's hands look like she's been butchering something after a hunt, but the Doctor -- after going under, he is quite red. She notices a mark on his face, a slight bit darker, where she put her hand. For some reason, this is almost amusing and she bites her lower lip to keep from smirking. It is not appropriate to find anything humourous.

Still holding her skirts, she has to agree -- down, out, and around the corridor are not possible. Thus the only preposition they have left is up. Since the Doctor went first last time, it is only fair that Morgana lead the way this time.

It is important to note she does not ask permission to lead -- nor would she think to. She simply starts heading up the stairs.