When Nani cut inside off the right wing and unleashed an unstoppable shot into the top corner against Chelsea, everybody at Old Trafford went wild.
Well, almost everybody. The Chelsea players, staff and fans didn't, of course. But neither did Sir Alex.
The Reds boss stood up, arms outstretched, but there was no evidence of joy on his face. Just confusion.
"I was in shock," he told ManUtd.com. "It was a phenomenal strike.
"But then, Nani's capable of those sorts of goals. Sometimes they end up in Row Z, sure, but he's capable of scoring these spectacular goals.
"When he came inside off the wing there was a pass to his left that I was wanting him to play. I was thinking, 'pass it, pass it' and then... what a hit! Unbelievable. I couldn't believe it had gone in."