Michu says the famous win was "like a dream".
He told the South Wales Post: "It was like a dream.
"The defence was good and in attack we had 12 attempts on target, so we were very good all through the team.
"The manager told us we were very good in the first half against West Brom, and that we could bring that performance here to Arsenal, and we did.
"For the goals, it was a great pass from Luke for the first and Nathan did a lot of good work for the second. I was very happy to take my chances and score.
"I'm very happy here with my team-mates, the gaffer and the club.
"I hope it continues like this."