Coach John Kavanagh took to social media to tell his followers of how a 'big guy' had walked into his gym offering to fight him.
Kavanagh owns and runs Straight Blast Gym and the premises is home to a mixed martial arts academy and professional team; with Conor McGregor the most notable product of a gym which has produced multiple MMA stars.
He remains thoroughly involved at the gym, and just yesterday he was accosted by a man who entered the gym looking for a fight with him - the motive for which turned out to be hilarious.
Taking to his Facebook page, Kavanagh explained the encounter.
He said: "I had a big guy burst into my gym yesterday.
"Stormed past reception and made a line for me on the mats.
"Now this is during my busy MMA class where +50 of the most dangerous fighters in Ireland are training."
Kavanagh smelled a rat initially, and explained how he braced himself for the worst.
He continued: "I somewhat readied myself and said what's up?"
And the aggressor made clear his intentions, bellowing:" I WANT TO FIGHT YOU!!!"
Kavanagh continued: "I asked him why."
The man in question responded: "YOU KNOW WHO I AM!!
"I assured him I didn't," Kavanagh clarified.
It was at this moment the man in question clarified that his reason for wanting a fight was that Kavanagh had refused him entry from a pub two decades ago.
He said: "YOU REFUSED ME AND MY BROTHER FROM TURKS HEAD!!"
Kavanagh described his disbelief at the protracted nature of the grievance, saying: "It took me a minute...."so you want to fight me [sic] coz I refused yous from a pub I worked at TWENTY YEARS AGO??"
"Talk about holding a grudge," he quipped as he concluded the post.
With aggression and confidence in spades, he might just be Straight Blast Gym's latest recruit.
Get the latest sports headlines straight to your inbox by signing up for free email alerts