Rose instantly relaxed and smiled ear to ear. Still the Doctor where it mattered most. She reached out, her hand over his, not thinking about it, "We should go see it," she poked her tongue over her teeth, before realizing what she'd done and withdrawing the hand blushing scarlet, and just nodding curtly about the corruption.

"I've seen it," she said softly, glancing away. "In the latter stages. When it starts undoing existence. Reality." She glanced back seriously. "It's actually better that there isn't anything. It can't be noticed or felt until it's too late. When it's already started removing something important."

Back to glancing away and she savaged a chip to take out her aggression. "Like potato blight, but instead it's reality. And then it just all goes dark." Nom!