It takes energy to tackle, get up off the ground, and tackle again and again. The Wallabies, so good at it in the first half against the All Blacks in a superb defensive performance in Sydney had to pay for their efforts at some stage in this gripping Bledisloe Cup test.
It was straight after halftime, as it turned out. Green and gold heads dropped once Jack Goodhue went over from 50m out for his first try in test rugby – one he'll never forget – and they dropped further once the All Black scrum, that Rolls Royce of set pieces, turned the screw.
The tries flowed from there, a case of the All Blacks reaping the rewards of some serious hard work as they put one hand on the Bledisloe Cup once again ahead of the return at Eden Park next weekend. It's a long way back for the Aussies, who were supported by those who poured on to the (badly-delayed) trains in central Sydney with hope in their hearts.
There are positive signs for Michael Cheika's men, though. The All Blacks wouldn't have been shocked by the Wallabies' first half defensive effort because they would have been preparing for exactly that.