On October 29, 1921 occurred one of the greatest upsets in college football history. The Praying Colonels of Centre College (Danville, Ky.) defeated football powerhouse Harvard (Cambridge, Mass.).
Harvard - undefeated since 1918 - played Centre at Harvard Field the year before when Centre led 14-6 at the half. Harvard went on to win that game 34-14, but Harvard captain offered the game ball to the Centre captain. Centre's captain, Bo McMillin refused saying that the team would "be back next year to take it home with us."
Centre delivered. Scoreless at the half, McMillin rushed into the endzone during the third quarter and Centre won 6-0. C6, H0. When the news travelled to Danville, students painted this "formula" on everything (even cows!).
Today, only the above graffiti remains. But the legend certainly lives on... Oh, and Harvard is still scared. The Crimson refused a rematch on the 75th anniversary.