Gloucester prop Nick Wood apologised to his team-mates after he was red carded in Sunday's 44-12 loss to Saracens at Allianz Park.
Wood stamped twice on the exposed head of Saracens flanker Jacques Burger with just 73 seconds on the clock in the second fastest dismissal in the Aviva Premiership's history.
Wood has a fine disciplinary record, but he appeared to be sighted as he stamped on Burger, some distance from the ball, and now faces a lengthy suspension.
Referee Wayne Barnes showed little hesitation in giving Wood's marching orders and Gloucester director of rugby Nigel Davies agreed with the official's decision.
"It's very difficult for Nick, he's in bits in the changing room," Davies revealed after the match.
"I saw it on the big screen like everybody else and it didn't look great.
"Nick is not a dirty player and never has been. He's a good technician and a good rugby player.
"We'll look at the video and take it from there. The red card, as it was seen by the referee, was fair.
"Nick's apologised for what happened and has been big enough to do that. He's a good guy and will come back stronger.
"Everybody makes mistakes."