Leinster were being absolutely crushed by Clermont in the first half of the European Champions Cup semi final. After a disappointing day for Munster on Saturday, it looked like Leinster would face a similar fate. Two tries conceded in the first fifteen minutes had them staring down the barrel.
Three penalties in the first fifteen minutes of the second half changed everything.. Leo Cullen's side had the momentum and looked like they had taken the lead after Dan Leavy crossed over.
However, Nigel Owens went to the TMO after a complaint from Aurélien Rougerie. After a second look, the replays showed that Leavy had created the space for the Leinster break that led to the try. One problem - he had done so illegally, by holding onto the foot of Rougerie following a ruck.
It was crucial, as Clermont were given a penalty, which Morgan Parra slotted over (electing not to try and scab a few yards as he did earlier in the game). A ten point swing which could've been oh so different had Leavy let go.