Of the many irritating aspects of rugby's set of complex rules and interpretations, there is one that stands out - the halfback who stands behind a ruck for what seems like an interminable amount of time, with the ball sitting on the ground and the opposition essentially powerless.
It has become the new, surreptitious way to wind down the clock and this anomaly will come into sharper focus in the knockout stages. Imagine a Rugby World Cup semifinal or final. Three minutes on the clock, one team ahead by a few points. Instead of a frantic finale, the more likely scenario is one team killing time.
The halfback is able to waste 10, 20 or even 30 seconds with the ball sitting dead at the back of the ruck. Three or four instances of that, a few "pick and goes" and the game is over.
In almost every other team sport there is a genuine contest for possession right until the end; it means the trailing team will usually get one or two last shots, but currently rugby's laws and interpretations predicate against that.
One of the greatest thrills in sport is the last-second comeback, the triumph against all odds, whether it is the impossible buzzer-beating three-pointer in basketball, a last-minute bomb in league, a last leap into netball's goal circle or a final desperate attack in football.