"I don't know if I should have done it but that is the way I live the game and I couldn't help myself."
Arteta ran out of his technical area as he realised Imran Louza's cross-field pass was going to sail out of play.
He caught the ball and threw it to Bukayo Saka, who took a quick throw-in and eight seconds later the ball was in the back of the net.
Cedric Soares, Martin Odegaard and Alexandre Lacazette all played a part in a one-touch move before Gabriel Martinelli fired home.
Arteta pumped his fists in the air and turned round to be hugged by one of his coaches - as if he had scored the goal himself.