Georgian flanker Viktor Kolelishvili was lucky to escape with just a telling off and a penalty after he pushed referee Wayne Barnes during Clermont's defeat by the Ospreys in the weekend.
The French visitors were defending a 7-3 lead at the time of the incident, thanks to an early try from Wesley Fofana, when Kolelishvili grew frustrated with Barnes' positioning.
The Georgian then shoved Barnes as Clermont prepared to repel another Ospreys attack drawing cries of derision from the home crowd.
Barnes was well within his rights to hand Kolelishvili a red card but instead just gave him a warning.
"If I'm standing in your way please just ask me to move," Barnes said.