Hammer the hammer.
It's an expression normally reserved for those operating between the white lines but one that seems perfectly applicable in a wider context now that Steve Hansen has identified Joe Schmidt's meticulous nature as a possible Achilles heel before New Zealand and Ireland meet this Saturday in their World Cup quarter-final.
Schmidt's attention to detail and fastidiousness is legion after almost a decade pulling the strings at Leinster and Ireland.
And that work ethic and attention to all sorts of minutiae is reflected in an Irish side that has earned such success under his keen eye by doing the simple things well through endless repetition on the practise ground.
But the All Blacks have been duly warned. Losses to Ireland, in Chicago in 2016 and in Dublin last year, have put the back-to-back world champions on notice ahead of their next meeting, in Tokyo, and Hansen was in typically mischievous mood when he set the scene on Monday.
"We've got weaknesses like everybody else, so you've got to look at your own weaknesses as much as anybody else's,” said the head coach.
“You know that Joe does a lot of studies, so that can be a strength and a weakness. I might be able to set him up."
Hansen loves to chuck these verbal grenades.
He set up last November's meeting with Ireland by claiming that the winner would be the best team in the world and he reacted afterwards by wondering aloud how Ireland would cope with that monkey on their back.
Not well was the answer.
Ireland's form has been patchy at best in 2019 but they showed signs of that familiar rhythm and mechanical excellence again
Hansen promised there would be no complacency on their past, not when they have lost two of the last three games between the sides, although there was a remark thrown in to the pot about how the past bears no relevance on what's to come.
"There's a lot of respect from both sides. We played them in November and it was a titanic struggle and on the day they were the better side. Most teams we play get up ten per cent better than they normally do and they're no different.
"The big difference here is it's a do-or-die game for both teams,” he explained.
“Both teams are in good nick - fresh, excited - and, I can only speak on behalf of ourselves, we're really looking forward to the challenge."
The All Blacks have blazed their way through to this stage.
They have registered as many tries (22) as they have points conceded against them but their passage has not been without some difficulties off the field.
The Barrett brothers – Beauden, Scott and Jordie – will enter the game having suffered the sudden loss of their grandfather Edward Michael Barrett.
Known as 'Ted', he passed away on Sunday at the age of 78 back home in New Zealand.
The team as a whole had already been forced to recalibrate due to the issues brought to bear by
Their outing against Ireland be their first official hit-out in 13 days as a result.
Add in the fact that their last two games were cakewalks against Namibia and Canada and it will actually be over a month since their last proper test when they withstood a ferocious examination from South Africa to claim an impressive win in Yokohama.
Schmidt was clearly annoyed at the discrepancies in lead-ins teams will have for the four quarter-finals to come when asked about the cancelled games and their own exertions against the physical Samoans on Fukuoka so this is clearly a glass half-full or half-empty proposition.
Hansen and captain Kieran Read have both done their best to portray their extended and unexpected break in the best possible light while playing down the perception that the All Blacks have struggled in the past when there have been gaps between games.
Both have spoken in mysterious tones about a full-on training game that was conducted behind closed doors last Friday.
For those of us with any knowledge of GAA, it sounded for all the world like one of those legendary training sessions held by the Kilkenny hurlers in Nowlan Park.
It may well be that the session was more competitive than anything Italy might have thrown at them.
The Azzurri were blitzed by the Boks in Pool B and their record against Tier One nations is, in general, appalling and with no signs that better is to come.
"Having a week off is not a bad thing,” said Hansen who, though his contract up after this tournament, was disinterested in the notion that this could actually be his last match in charge.
“We're quite excited by that fact. It's allowed us to work really hard Friday.
“GPS numbers were equivalent, or just above, what a normal test match would be so we don't feel like we've lost any opportunity to get ourselves where we need to be.
“The exciting part is we had Saturday locked up in the hotel and had a whole day's rest when we couldn't do anything because of the storm."