The Doctor: Isn't that a… magnetic resonance imaging thing? Like a ginormous sort of a magnet? I did Magnetics GCSE. Well, I failed, but all the same.
Florence: A magnet with its setting now increased to fifty thousand Tesla.
The Doctor: Ooh, that's a bit strong, isn't it?
Florence: It'll send out a magnetic pulse that'll fry the brainstems of every living thing within two hundred and fifty thousand miles. Except for me, safe in this room.
The Doctor: But… hold on, hold on, I did Geography GCSE- I passed that one… doesn't that distance include the Earth?
Florence: Only the side facing the moon. The other half will survive. Call it ... my little gift!