Ross Moriarty saw red - both literally and figuratively - late in Wales' 30-12 win against Argentina on Saturday.
Wales led 30-5 in the 83rd minute when number eight Moriarty and Argentina out-half Nicolas Sanchez got into a tangle on the ground.
Moriarty did not take kindly to being shoved by Sanchez and reacted by putting his opponent into a choke hold.
Despite the assistant referee and a medic both attempting to persuade Moriarty to release Sanchez, he refused. It took an intervention from Argentina backrow Marocs Kremer for Moriarty to let his opponent go.
After reviewing the footage, referee Jaco Peyper felt he had not choice but to show the 24-year-old a red card.
"This is very serious," Peyper told and incredulous Moriarty and Cory Hill.
"It's deliberate, it's around the neck, he chokes him. The assistant referee tries to pull him off three times. He chokes him. That's ultimate sanction, that's red."
In the post-match press conference, Warren Gatland that he was not 100 per cent certain it was a red card but that he could see the referee's point of view.
You can watch footage of the incident below. The game was broadcast live on Channel 4.