"The IRB said if you lift up a player and drop him it's a red card, and that's exactly what I did," he said. ""I can't complain. There was no point in appealing against it and I didn't have a leg to stand on really."
"I felt like as soon as it hit him his bodyweight took control of what happened."
It was Warburton's first red card in his short career and that contributed to some of his initial shock then disappointment.
"If I had to do it all over again I would do the same thing," said Rolland. "The important part for referees is to take the emotion out of it."
"We can only officiate on the action itself and what he did merited what happened next because it was dangerous," Rolland told the Western Mail.
It was not his job to rule on intent, he was asked to judge actions as they unfolded. What happened left him with no alternative.