Wellington - Air New Zealand has offered Irish rugby fans some tongue-in-cheek "safety tips" before the countries face off in the quarter-final of the Rugby World Cup in Japan on Saturday.

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The highly tipped All Blacks are straining not to seem cocky ahead of the match in Tokyo, but the national flag carrier has no such qualms, urging Ireland fans to brace for impact.

In a made-to-go-viral online ad, "flight attendants" give a safety briefing in a house occupied by an increasingly forlorn trio of Irish supporters, telling them "to lean forward into the crouch position with your head in your hands" in the event of an early New Zealand try.

New Zealand are favourites to win the clash and go on to lift the Webb Ellis Cup for an unprecedented third successive time. 

But the southern hemisphere side has struggled in recent head-to-head games with the Irish.

"Having won two out of the last three games, some Irish supporters may be expecting a pleasant journey," the faux flight attendants note.

"However, we happen to think you might be in for some upcoming turbulence. 

"Should the game go down to the wire, an oxygen mask will automatically drop down. Otherwise, please remain seated until your disappointment has come to a complete halt."

"Anything to add @AerLingus?" the company tweeted, taunting Ireland's national flag carrier into a response.

Air New Zealand posted the advert on their Twitter feed:

Teams:

New Zealand

15 Beauden Barrett, 14 Sevu Reece, 13 Jack Goodhue, 12 Anton Lienert-Brown, 11 George Bridge, 10 Richie Mo'unga, 9 Aaron Smith, 8 Kieran Read (captain), 7 Sam Cane, 6 Ardie Savea, 5 Sam Whitelock, 4 Brodie Retallick, 3 Nepo Laulala, 2 Codie Taylor, 1 Joe Moody

Substitutes: 16 Dane Coles, 17 Ofa Tuungafasi, 18 Angus Ta'avao, 19 Scott Barrett, 20 Matt Todd, 21 TJ Perenara, 22 Sonny Bill Williams, 23 Jordie Barrett

Ireland

15 Rob Kearney, 14 Keith Earls, 13 Garry Ringrose, 12 Robbie Henshaw, 11 Jacob Stockdale, 10 Johnny Sexton, 9 Conor Murray, 8 CJ Stander, 7 Josh van der Flier, 6 Peter O'Mahony, 5 James Ryan, 4 Iain Henderson, 3 Tadhg Furlong, 2 Rory Best (captain), 1 Cian Healy

Substitutes: 16 Niall Scannell, 17 Dave Kilcoyne, 18 Andrew Porter, 19 Tadgh Beirne, 20 Rhys Ruddock, 21 Joey Carbery, 22 Chris Farrell, 23 Jordan Larmour