Roy Keane isn’t exactly known for his jovial sense of humour.
The former Manchester United captain is a straight-talking, no-nonsense kind of guy - the type you certainly wouldn’t want to mess with.
However, Keano showed off his lighter side ahead of the Republic of Ireland’s second Euro 2016 group-stage match against Belgium on Saturday - playing a prank on the national team’s goalkeeper coach, Seamus McDonagh, in training. (Scroll down this page to watch the video).
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Keane spotted McDonagh was about to kick one of the footballs on the ground, so quickly moved it out of his colleague’s path.
Much to the amusement of Keane, McDonagh ended up flat on his back.
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Video: Keane's prank on goalkeeper coach
It was a pretty mean prank but then what would you expect from Keane? It was also very amusing, though, and McDonagh saw the funny side of it.
One can only imagine how Keane would have reacted had it happened to him. It might have been Saipan all over again.
Keane's comments on Eden Hazard
Ahead of Ireland’s match against Belgium, Keane was asked about comments he made earlier this season on Eden Hazard.
After Chelsea’s Champions League encounter with Paris Saint-Germain, the retired midfielder branded Hazard “a spoilt child” and said he would “kick him up and down the training pitch” following the winger’s comments about potentially leave Stamford Bridge.
"That's nothing personal,” Keane was quoted as saying by Sky Sports on Thursday. “I would do that to anybody who was talking about possibly wanting to leave all the time.
"It's nothing against the lad - I think he's a talented boy. I'd like him to be in our group, he's a really, really top player.
"He's had a difficult season, I suppose, but that's because maybe he set his standards so high the previous season.
"If you'd asked me if I was playing with anybody, whether I was at Forest, Rockmount, Cobh Ramblers, and they were constantly talking - if it was true - that they wanted to leave and they had a poor attitude to training, then I would kick them in training, yes.
"But I have kind of done that with most players, I suppose, even lads who didn't want to leave."
How far will Republic of Ireland go at Euro 2016? Have your say by leaving a comment below.