In gridiron football, untimed play occurs in the following situations: All untimed downs are subject to the play clock and must commence before it expires, or else a delay of game penalty is levied.
If a goal is not scored from the kick, the play is considered complete if the ball has stopped moving or left the field of play and if the ball is touched by any player other than the defensive goalkeeper.
This lack of additional time has proven controversial in situations where a team is trying to score a goal late in a game only to be denied by a whistle.
An example of this took place in the 1978 FIFA World Cup when Brazil appeared to have scored from a corner kick in the final seconds to win the match against Sweden 2-1, only for referee Clive Thomas to have blown the full time whistle as soon as the corner had been taken.
In modern practice referees are encouraged not to blow for time if a team has won a free kick or corner kick without letting them attempt to shoot or cross the ball for a goal attempt.