Arsenal manager Mikel Arteta reacted to Marcus Rashford opening the scoring for Manchester United by quickly coaching Ben White and then revving up the crowd.
Rashford made the Gunners pay with a shot from distance at the Emirates on Sunday after a Thomas Partey pass was intercepted by the United goalscorer and played to Bruno Fernandes.
The Portugal international laid the ball back to Rashford as the United move progressed, with the Red Devils finding themselves with the numerical advantage of four on three.
The reason for this is that right-back White had already started sprinting up the wing without turning his head, and by the time he discovered his teammates had lost the ball, he was too far up the pitch to retreat.
Meanwhile, Rashford skipped past Partey and after making a bit of room for himself shot and beat Aaron Ramsdale from long range.
Without skipping a beat, Arteta pulled White over towards him and began coaching him on his positioning as the rest of the Gunners squad faced up to resume play.
Arteta wasn't angry with the full-back but instead appeared to calmly explain what he wants to see from him with arm gestures.
As White got back into position, Arteta then turned towards the Arsenal fans and pumped his hands to encourage them to get behind the team.
Gunners supporters responded immediately by chanting loudly and it wasn't long before the now revved-up Arsenal side drew the scores level through Eddie Nketiah.
The Arsenal fans then began singing Arteta's name, with the Spaniard responding to the song by putting his arms up, punching the air and clapping the crowd.