Perhaps it was lack of sleep that convinced Angelique Kerber to take the "crazy" theme from Saturday night to the next extreme by taking a morning plunge into the murky Yarra. 
She was not back at her hotel until 4am, then headed to the bar to celebrate with her close-knit team, just three hours before media duties.
That involved a photo shoot at Government House - home to the first woman, Linda Dessau, to hold the Victorian vice-regal office - and an unscheduled swim for the first German woman to win a grand slam singles title since Steffi Graf in 1999.
Jim Courier was the first to start the champion's dip-in-the-river ceremony, in 1992. Strangely, the trend has never really caught on.
Kerber, though, was determined to settle her pre-tournament bet, even though "it was cold, and the river's a little bit dirty", she admitted with a smile. Nor had she been deterred the previous night on Rod Laver Arena, where the major finals debutante completed a brave and improbable victory against six-time defending champion Serena Williams.
In 32 previous slams, she had reached just one semi-final. She had turned 28 the day before a shaky opening round in which she saved a match point.
By Sunday, she was $3.4 million richer, the new world No.2, her commitment vindicated and her improvement - physically and, particularly, mentally - validated. The fact the breakthrough 6-4, 3-6, 6-4 victory came against the greatest player in the game made it more satisfying.
"Actually, it's still a little bit strange, but I think after these hours I try to realise that I really am one of the players that won the grand slam," Kerber said on Sunday. "It sounds still a little bit crazy but, at the end, it sounds great. That was always my goal to win a grand slam, and last night my dream came true, so it's really nice."
Kerber said she knew even when leading 5-2 in the third set that the contest was not over. "When I won the match point, I had so many emotions and, of course, positive things, getting in my mind that I [am] making history as well in Germany and everybody is supporting me, so it was a kind of a feeling that I will never forget."
Williams' coach Patrick Mouratoglou's neat summation was of the winner having played the match of her life to beat an opponent who did not serve well in the big games, failed to execute at the net and was not able to perform at the level she had earlier in the tournament.