Leo Cullen played in one shocking Euro back to back turnaround with Leinster - and doesn't want to preside over another at Kingsholm today.
It was in December 2013 when the Blues went to Franklin's Gardens and, inspired by Brian O'Driscoll and a Luke Fitzgerald hat-trick, they put 40 points on Northampton Saints.
A week later, however, the Saints came to the Aviva Stadium and turned the tables with a gritty 18-9 victory, leaving Cullen and co gobsmacked.
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It isn't strictly the same scenario this time around as Leinster destroyed a weakened Gloucester team 57-0 at the RDS before Christmas, but it the sides' first outing in Europe since then and Cullen knows that it will be a different story in front of the passionate Shed crowd at Kingsholm.
"If you look back at the history of the competition and the swings over those back to back games," he said.
"I know it's back to back games with domestic action squeezed in between but there's been some very contrasting score lines in these back to back fixtures and we don't want to be one of those stats again.
"I know talking to some of the Gloucester coaches, they're aware of what we do and are very clued in. They've a few guys in the backroom team, Dan Tobin and Tommy Turner who are ex-Leinster, so they have a bit of inside knowledge.
"There's always a danger in that."
Cullen and Stuart Lancaster were among the Leinster coaching party that travelled to Kingsholm to watch Gloucester take on Saracens last week and so have an idea of what is awaiting the four-time tournament winners this lunchtime.
