[throwawayjava]

Parent is referring to https://en.wikipedia.org/wiki/Hurry-up_offense

Another interesting thing: one major advantage of speed is actually slowing the game down.

E.g., if you move quickly between plays, you can catch the other team with too many men on the field during a substitution. in that case, you sometimes get a "free throw" (if the play works out, you decline the "too many players on field" penalty; but if the play doesn't work out or the other team intercepts the ball, you take the penalty and pretend like the failed play didn't even happen.

So you can actually increase the length of the game by moving quickly in-between plays...