VIDEO: If anyone knows what Ulster’s players were up to in their dressing room, please tell us

That's one way to prepare for a must-win game.

Ulster are playing Glasgow Warriors in the Guinness PRO12 semi-finals, this evening. Win and they get to play the final in their home ground of Kingspan Stadium. Lose and the season is over. And what better way to prep than getting yoghurt slapped into your face by a mechanical device. Whatever is happening here, it looks like Robbie Diack lost the bet...

@Robbie_Diack got the unlucky turn on our change rooms new game. #Craic supplied by @thepain15. pic.twitter.com/9148bD8fIY

— robert herring (@robert_herring2) May 21, 2015