Although conceding the manner of the loss was a shock, the boss is already switching his focus to the second meeting of the season with the Merseysiders as the Reds aim to avenge the 1-0 beating at Anfield in the Barclays Premier League.
"Well, it's gone now isn't it?" said Moyes of Sunday's 4-1 reverse at the Etihad Stadium. "I can't do anything about it so we move on and get ready for the next game.
"Yeah, it did [shock me]. But when you're a football manager for the length of time I have been, you are always going to have shocks. I've had lots and I have got no doubt there will be more in the future. That's the way football is.
"To get back on and play again is the best way to do it. You can't dwell too much on it. We're looking forward to getting the next game started and hopefully trying to win. I'm still getting to know all the players here and I have got a chance to get to know a few more of them this week and we'll see what they can do."
The fact that Liverpool come to Old Trafford provides added spice to the third-round encounter, particularly with the visitors' star striker Luis Suarez poised to make his comeback from a lengthy suspension.
"It's always a big game when you play any cup tie," he stated. "When you play Liverpool at Manchester United, it's a big rivalry. You could be right, it could take on a bigger