Michael Clarke admitted he couldn't quite believe Australia had gone 4-0 up in the Ashes after their eight-wicket win over England in Melbourne.
The hosts chased down a target of 231 in style on the fourth day, opener Chris Rogers (116) leading the way as he registered his first Test century on home soil.
Shane Watson finished up unbeaten on 83 as Australia completed an astonishing turnaround in the contest - midway through the previous day they had trailed by three figures after surrendering a first-innings deficit of 51.
However the seam-spin combination of Mitchell Johnson and Nathan Lyon sparked a dramatic England collapse, the tourists going from 65 without loss to 179 all out despite a battling 49 from Kevin Pietersen.
"I wouldn't stand here and say I didn't expect us to win the series. With the team we have and the amount of work the guys have put in for a long time, I certainly had faith we would win the series," Clarke said.
"But to be 4-0 up... It's hard to describe. It's an amazing feeling.
"Even in my own mind, after the first day, for me to bowl first I expected to bowl the opposition out on that first day.
"That didn't go to plan, but it shows the confidence I have in our bowlers. Our bowling attack is outstanding."
Rogers was delighted to reach three figures at his home ground of the MCG, particularly after he had made it to 61 in Australia's first innings before lobbing a catch to mid-off.
The opener made the most of being dropped on 19 and 81 to make his second Test ton, the other coming during the English summer at Durham Emirates ICG.
"It doesn't get better than this. To win a Boxing Day Test and to get a hundred on the last day - it's what dreams are made of," the Middlesex batsman said.
On the match itself, Rogers added: "We were behind in the game. We were quite worried, but we knew if we hung in there we'd get a few wickets and then hopefully knock the tail over. Then to come out and bat so well, that's fantastic."