Wayne Rooney hit a superb set-piece hat-trick, while Ashley Young (2), Danny Welbeck, Nani and Ji-sung Park also struck as United stormed to the top of the league on goal difference.
“It’s unusual because you don’t expect it,” the Boss told MUTV. “We’ve scored six against them twice in the past, so maybe when we hit form like that somebody suffers. Today it was Arsenal who unfortunately suffered.
“We’ve had a couple of big results against them in the past, but when you see Arsenal’s team like that, we do expect to score goals. I felt all their quality was in the forward positions and they were a threat at times. They could have scored more than two goals.
“It was a funny game, a strange result but we can only do our jobs and I think the players kept it professional that way and did their best. We’re showing great energy at the moment and great enjoyment in our game, and that’s important.”
The forward-thinking efforts of Rooney and Ashley Young drew praise from the manager; the former for his seamless evolution into the leader of United’s new-look attack, and the latter for how quickly he has settled into life at his new club.
“Fantastic,” said the Boss, of Rooney. “He’s thriving in his role of leader of the front players. Welbeck’s young, Hernandez is young, Ashley Young has just joined and Wayne’s thriving in the responsibility and I think that’s important.”
On Young’s spectacular brace, Sir Alex marvelled: “Marvellous goals, fantastic. He’s settling in