There were a few occasions where tensions threatened to boil over after the whistle when Munster faced Glasgow on Friday night
As a result, referee Nigel Owens produced something very unusual to make it very clear that the additional aggression would not be tolerated.
The Welshman called all 30 players in for a lecture where he let them know that what he had seen so far needed to stop or he was going to send someone off.
Níl ach ‘Boss’ amháin ann anocht @Munsterrugby #pro14 #TG4 pic.twitter.com/ZpHJAcF0PP
— Spórt TG4 (@SportTG4) September 22, 2017