Side note: I recently brought it to my league operators attention that some players are deliberately stalling to gain an advantage. Waiting until the opponents ball is almost stopped to strike theirs. Has happened to me twice. First time I almost froze it so it didn't matter, second time though I got it to maybe the middle of the rack depth wise and the guy easily beat me. I didn't say anything at the time because I don't like to argue during matches unless it's a BIG deal cuz all it does is get in MY head.
actually the lag has to be repeated if that happens
from the WPA rules
pertinient area bolded by me
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1.2 Lagging to Determine Order of Play
The lag is the first shot of the match and determines order of play. The player who wins the lag chooses who will shoot first.
The referee will place a ball on each side of the table behind the head string and near the headstring. The players will shoot at about the same time to make each ball contact the footcushion with the goal of returning the ball closer to the head cushion than the opponent.
A lag shot is bad and cannot win if the shooter’s ball a) crosses the long string;(b) contacts the foot cushion other than once;(c) is pocketed or driven off the table;(d) touches the side cushion; or(e) the ball rests within the corner pocket and past the nose of the head cushion.In addition, a lag will be bad if any non-object-ball foul occurs other than 6.9 Balls StillMoving.
The players will lag again if a) a player’s ball is struck after the other ball has touched the foot cushion;(b) the referee cannot determine which ball has stopped closer to the head cushion; or(c) both lags are bad.