At play the borderline is typically unpredictable and sometimes very disconcerting. He may have great difficulty with recreation and play with a seriousness that is out of proportion to the relaxed nature of the activity. He may be your newly assigned tennis doubles partner who at first seems nice enough, but as the game goes on becomes increasingly frustrated and angry. Though you continually remind him that “it’s just a game,” he may stomp around, curse himself, throw the racket, and swear to give up the sport.
