Untimed Down in Colts/Chargers Game Brings Little Known NFL Rule to Light

With 00:07 seconds remaining in the game, and the Colts leading by four, Indianapolis faced a fourth down and the prospect of having to punt it away. With such a small amount of time remaining, all that was needed was a good snap and a decent kick, after which the clock would hit double zeroes and the contest would surely end… Or would it?