The drop kick is a relic of the NFL rule book that, like a place-held kick, can be used to convert a field goal or extra point. The drop kick is found in Rule 3, Section 8, and is defined as "a kick by a kicker who drops the ball and kicks it as, or immediately after, it touches the ground."
The drop kick went without a successful use from 1941 until the last game of the 2005 NFL season. On January 1, 2006, New England Patriot quarterback Doug Flutie, in a game versus the Miami Dolphins, came into the game and lined up behind an offensive line with four tight ends. A wide receiver was also in the game, suggesting some sort of two point conversion attempt.
Before the ball was snapped, Flutie ran backward to the Miami 12 yard line. The center snapped the ball to him and Flutie executed the drop kick, earning the Patriots one point.