The golfing superstar is a big Ulster fan, and while he was home over Christmas during his off-season, he thought he'd take in a quick game. 

At half time, he was giving an interview to the BBC about being home for the break and getting some time off when a chorus of 'Sweet Caroline' broke out behind him in the crowd, which was most likely a reference to his engagement to Caroline Wozniacki that came to an end earlier this year. 

Rory thankfully saw the funny side of the whole thing, and kept his cool pretty admirably as the interview went on, despite stopping to have a little chuckle to himself.