QI, Series F

Stephen Fry:
Now. Picture the scene. I'm out windsurfing. The breeze is ruffling my trousers and sun-bleached hair. I look up, and I see on the horizon a ship. How far away is it?

Alan Davies:
Twenty-one miles.

Stephen Fry:
No.

Alan Davies:
I thought it was always twenty-one miles.

Stephen Fry:
No.

Alan Davies:
I didn't even get flagged for that.

Stephen Fry:
No, no, I didn't know that anybody always thought that it was twenty-one miles.