She's quiet; the Doctor bounces up on the balls of his feet, his hands shoved deep in his pockets, waiting for the look of awe to break across her face.

"Well, I'm not one to judge," she says at last, in her gravely voice, "but it really could use a good going-over -- where do you keep your vacuum cleaner?"

She opens the first door she sees, which could have been a broom closet if it wasn't the door to the TARDIS pool, and the Doctor rushes forward, but not in time to avoid the splash.