"D'you know like we were saying ? About the Earth revolving ? It's like when you're a kid, the first time they tell you that the world's turning and you just can't quite believe it because everything looks like it's standing still. I can feel it... the turn of the Earth. The ground beneath our feet is spinning at a thousand miles an hour and the entire planet is hurtling around the Sun at sixty-seven thousand miles an hour, and I can feel it. We're falling through space, you and me. Clinging to the skin of this tiny little world, and if we let go... That's who I am. Now forget me, Rose Tyler. Go home."

(The Doctor, Doctor Who)