 If in a situation where the coach finds that his team does not absolutely require a successful two-point conversion, he may give his quarterback permission to call an audible and turn the play into a field goal attempt.In this "slide," the players on the line move back to the center, the quarterback becomes the holder for a place kick, and the halfback becomes the kicker.Some teams initially line up in the formation for every or nearly every extra-point attempt before shifting back into a conventional placekicking formation.