"Walk outside the front door, and you'll find yourself in the vortex. I don't recommend it." The Metacrisis Doctor fixed John with a stern look. As sorry as he was for what had happened to John and what would happen, the man had to understand. The Doctor wasn't going to have John's death on his conscience twice over.
"Do you remember the vortex? From your journal and your dreams? If you do, you know how dangerous it is."