The Aviva stadium was an unfortunate victim of a banter event this afternoon as Jarvo, sport's most annoying gatecrasher, found his way on to the pitch during the anthems preceding Ireland v Japan.
Sporting a Japan jersey and the trademark #69 jersey, Jarvo - real name Daniel Jarvis - stood beside the Japan during their anthem "Kimigayo"
The self-described "Comedian/Film Maker/Prank-Star" was later escorted from the pitch by stewards.
BREAKING: Jarvo strikes again! pic.twitter.com/PkFLOHYFzO
— RugbyInsideLine (@RugbyInsideLine) November 6, 2021
He's back... pic.twitter.com/upv2E9fFti
— Neil Treacy (@neil_treacy) November 6, 2021
Jarvis was last seen at the Principality Stadium last weekend in an All Blacks jersey ahead of the Wales-New Zealand game.
Jarvo said after the game that he wasn't even arrested for the incident.
"When I got there, there weren't any stewards at the bottom of the steps. Then all the stewards come, and I was like, 'No!', but then one moved.
"So I had to quickly take my jacket off, walk down and jump over, but I forgot about the mask! That gave it away.
"If I'd got on there without the mask, I think I'd have been on there a lot longer."
While no one finds these capers amusing, they do ask questions about in-stadium security if someone as recognisable as Mr Jarvis can saunter onto the pitch in consecutive weeks in such high-profile sporting events.
Jarvo said in the same interview he has never been fined for his "pranks".
"When I first started doing it.... That one, I was panicking," he said about a stunt during a diving event at the 2016 Olympics in Rio de Janeiro.
"My whole body was like, 'Don't do it. Don't do it!' But I was like, 'If you can't do this, you're going to be a nobody'. That gave me a mad adrenalin rush. I've got more experienced in it now, and I don't get it as much as I used to."