As these candid pictures reveal, the young Armagh star stripped to his birthday suit as the internet dance craze was given a new twist in Belfast’s Holyland area last month.
Hundreds of people — most of them students — either looked on in amazement or joined in the web trend that’s sweeping the world.
Admittedly, most who took part wore costumes or even fancy dress as they spilled onto the streets to join other revellers.
But Ryan may well be having a few regrets today.
The 19-year-old student is a highly thought of member of the successful Armagh county minor football team and has also captained the Grange club, near his home in Blackwatertown.
One friend told us: “Kiernsy is lying low at the minute and you can hardly blame him.
“But then there’s not much he can really do or say. He’s managed to take down that image of himself from his own Facebook page but it’s all over YouTube.”
With St Patrick’s Day just around the corner warnings are already being issued to university students in the area about anti-social behaviour.