He felt sheepish about it later but halfback Aaron Smith says his roar came from the heart as the All Blacks scrum bulldozed the Wallabies' Bledisloe Cup hopes in Wellington.
A series of powerful New Zealand scrums early in the second half on Saturday swung momentum away from Australia, whose 27-16 loss saw them fall short in an 11th successive Bledisloe Cup series.
The scrum battle was starkly different from the first Test a week earlier, won 47-29 by New Zealand when both front rows were coming to grips with new engagement laws.
Smith was penalised more than once in Sydney for not putting the ball in straight and the Wallabies more than held their own.
He appreciated South African referee Jaco Peyper giving both teams more leeway in Wellington and it told as the All Blacks snared two tight-heads and won two penalties after halftime.
Smith let out a throaty cry following one of the penalties, which resulted in struggling Wallabies tighthead Ben Alexander being replaced.
"I don't like to be like that but you've got to let them know sometimes," he said.
"Our forwards all talking and the Aussie scrum dead quiet - it's a good feeling.
"There's not a better feeling than seeing our pack walk all over theirs."
Australian scrum deficiencies were exposed in their series-deciding third Test loss to the British and Irish Lions last month.
Coach Ewen McKenzie, a former prop, vented frustration with Peyper's rulings, which differed from those of compatriot referee Craig Joubert in Sydney.
"To be honest, I don't understand what's going on.
"I used to be able to work it out but now I don't know what's a penalty and what isn't.
"It's a completely different beast now."
