Gears of War Game Designer CliffyB interview in New Yorker

Allen Hux, otherwise known as 'irregular z-buffer wizard', pointed me to this article in the new yorker that gives some insight into the game development machinery that is Epic.

Trivia of the day: Where does the 'kill' sign, the skull inside the gear that you see when you get damage, originate?

$10 for first person to email me the correct answer.