Jack Conan is heading for Saturday's Pro14 semi-final showdown with Munster desperate to avoid a defeat that would "tarnish" Leinster's season.
The Champions Cup is in the bag, tucked away after a scrappy 15-12 success against Racing 92 in Bilbao but the celebrations have already been parked. This Leinster crop are insatiable.
"The celebrations were good craic," said 25-year-old flanker Conan.
"We did a lap of honour, had a few bottles of Heineken and then it was into the changing room for a few sing-songs. In my old age it didn't last too long. I was home in bed early enough."
Up next is a derby date with Johann van Graan's team, themselves straining at the leash to get some of their own glory having been forced to watch their rivals lift the big one in Spain.
Motivation, says Conan, is not hard to find.
"It's easy to turn the page when it's Munster you're playing against. It is tough because it was such a massive day in this club's history, and something that was fantastic to be a part of, but... no one wants to sit in that dressing room on Saturday after losing to a Munster side. We won't be dwelling on it too long.
"It's been fantastic, winning at the weekend, but when you look back in two or three months' time you'll think, yeah that was a great day but if we don't finish on a high it's going to be in some way tarnished a little bit."
Conan replaced Jordi Murphy for the last 18 minutes at San Mamés Stadium and made a crucial tackle on Teddy Thomas at the death.
He admitted he was completely unaware that Dan Carter had been ruled out, even as the game was ongoing - "I actually hadn't a clue he'd been ruled out until Lambie got injured and (Remi) Tales came on... at that stage I thought it was still Dan Carter on the bench" - but praised the Kiwi for his graciousness in defeat afterwards, while showering praise on his own comrades.
"Obviously everyone knows who Carter is - an absolute legend of the game. I saw a few of the lads go up and have a word with him. I'm sure for him it was a tough day, being ruled out so late.
"It's such a young (Leinster) squad and you've such a great mix of experience. The likes of James Ryan have come through... 21 years of age, stepping up, getting man of the match in a European final is absolutely crazy.
"Jesus at 21 I think I would have fainted if I'd walked on to a pitch in front of 55,000 people.
"I think it's only the start for Leinster rugby but we won't be getting too far ahead of ourselves."
The big days keep coming though and a rammed RDS will demand another mammoth push from their side.
It's a challenge Conan will "relish", and one he hopes departing favourite Isa Nacewa - who damaged his calf at the weekend - will recover for, his experience and presence being so crucial to this effervescent collective.
"There's always added emotion, added pressure when you're playing a derby game. Munster are in the RDS for the first time in a few years as well. That makes it even more special.
"Every time you face another province you know you vying against someone who is potentially a step ahead of you when it comes to getting a green jersey. There's massive pressure on these games and it's something we relish hugely.
"Isa is a fantastic leader. He leads by actions more than anything else, never feels the need to go over-talk, which I think is a fantastic attribute in someone you look up to.
"Even for what he's done on the pitch I think he's done even more for the culture of Leinster. He's someone who has driven the standard every single day."