When Granit Xhaka deliberately tripped Modou Barrow on the halfway line, most people thought it would be the yellow card it merited.
However, referee Jon Moss pulled out his red card and sent the Swiss international off, putting us in a rather vexatious position for the final 25 minutes.
The Gunners held on to put an end to the Swansea hoodoo, winning 3-2 in the end, and Arsene Wenger pulled out another fantastic quote when asked about it after the game.
“It looked harsh to me,” he said, “ut it was a deliberate foul. It looked a dark yellow – and the referee went for a bright red!”
The Arsenal manager backed his player to learn from it though, saying, “I think intelligence means you don’t make the same mistake twice, and I hope he learns from that.”
Wenger says he’s not going to appeal, so the £35m man will miss a single game – sitting out next weekend’s Premier League clash with Middlesbrough.