Twenty-nine years ago today, the New York Giants were headed toward an upset win over the Philadelphia Eagles. The Eagles had no time-outs; all the Giants had to do was kneel down and let the clock run out. It was such a forgone conclusion that they'd won that the credits literally started rolling.
Here's the original network broadcast that shows what happened next.
Today, it's known as "The Miracle in the Meadowlands."
Here's the original broadcast of another famous fumble, known as "The Holy Roller." In this case it turned out well for the fumblers, the Oakland Raiders, and since they were clearly cheating, the NFL would change the rules about late game fumble recoveries before the next season.