WATCH: Roy Keane plays simple, but effective prank on 64-year-old Ireland coach

Even one of the most serious men Irish sport is up for the craic now and again.

Roy Keane was seen playing a cruel prank on Ireland goalkeeper coach Seamus McDonagh at Ireland's training camp ahead of their Group E clash against Belgium on Saturday. The Irish coaches were having some fun on the training pitch, playing a game of football bowls (au francais: football petanque) when Keane pulled a sly one on McDonagh. As the sexagenarian was taking his run-up, young whippersnapper Keane fiendishly kicked his ball with expert timing to knock it clean out of the path of McDonagh's foot, just as he was about to connect with it. Of course, he fell flat on his arse, much to delight of Keano and the other coach present.   https://www.youtube.com/watch?v=nFWuwM3levY