Comparison of American football and rugby union
A rugby union game is divided into two halves of 40 minutes (or shorter for lower-grade games, and breaks given halfway through each half if playing conditions are considered to be extreme) separated by a half time period of up to 15 minutes in an international match. Most notably, a rugby union game will continue after the scheduled end of a half (half-time or full-time) until the ball becomes dead - any occurrence that would have play restart with a scrum or lineout, or when a team scores. This has led to some "nail-biting" finishes where teams losing by only a small margin work their way towards scoring, and games can go on several minutes over time. Something similar can occur at the end of either half in American football, though usually for only a few seconds of additional time, because a play that begins before the half expires continues until the ball is dead regardless of whether there is any time left on the clock. In both sports, the clock is also stopped during substitutions and for injuries, so the referee does not need to add stoppage time as is done in soccer/Association football. American football games are made up of four quarters of 15 minutes each (less at the high school and youth levels), but the clock stops and starts according to specific rules, so that a 15-minute quarter lasts much longer.
2000 Miami Dolphins season
At the beginning of the fourth quarter, Miami led New York 30–7. The Jets then proceeded to quickly close the 23-point deficit throughout the fourth quarter. By 3:55 left in the game, New York tied the game at 30–30, after scoring three touchdowns and a field goal, with a failed two-point conversion. About 22 seconds later, Miami scored a touchdown to re-take the lead. However, New York answered with another touchdown with 42 seconds left in regulation. Neither team scored again and the game went into overtime because of a 37–37 tie. In the fourth quarter, the Dolphins had only 1 first down versus 20 for the Jets, which was more than 15 other NFL teams had in their entire game in week 8. During overtime, Fiedler was intercepted about one minute in by Marcus Coleman, but Coleman fumbled and Miami recovered. However, Fiedler was soon intercepted again by Coleman; this time, the Dolphins were successfully overturned. The Jets then drove the ball to Miami's 23 yard line. With 8:13 left in overtime, John Hall kicked a field goal, ending the game 40–37 in favor of New York. The Dolphins fell to 5–2.