Stephen Hawking: …but then I said, "In that frame of reference, the perihelion of Mercury would have precessed in the opposite direction."

Albert Einstein: jejejeje, that is a great story.

Data: Quite amusing Doctor Hawking. You see, Sir Isaac, the joke depends on an understanding of the relativistic curvature of space-time. If two non-inertial reference frames are in relative motion…

Sir Isaac Newton: Do not patronize me, sir, I invented physics. The day the apple fell on my head was the most momentous day in the history of science.

Stephen Hawking: Not the apple story again!