A more extreme use of the "excessive delay of game" tactic in American football which I have seen used, and which led directly to the Seahawks' defeat in their most recent playoff game:
The game is almost over (only a few seconds remain on the clock.)
Team A has possession of the ball and is close enough to Team B's end zone that a field goal attempt is the logical play. At this point Team A's kicker is under a fair amount of emotional pressure, since he will be credited or blamed with the win or loss of the game.
The teams line up to make the field goal.
At this point, Team B calls a time out for the sole purpose of extending the psychological pressure on Team A's kicker.
(This is called "icing the kicker.")
In the Seahawks game, the timeout was called, but then Team A went ahead and kicked the field goal anyway... and *missed*... but because the timeout was called, the play didn't count and they got to try again.
The kicker made it the second time.