What An Flyer produced a tremendous late rally to land the spoils at Cork in the Follow Cork On Facebook Mares Maiden Hurdle.
Supreme Carolina appeared to have put the race to bed after the second last, as he led by some way under Ruby Walsh.
However, an awkward leap at the last gave What An Flyer (12-1) all the encouragement she needed, and she finished strongly under Robbie Moran to win by a length and a quarter.
Willie Kelly, representing the winning trainer Ann Lambert, said: "She won her bumper here and she seems to be coming back to herself now. She will go chasing down the line."
Walsh endured a similar fate in the Friday Evening Racing Maiden Hurdle, as his mount Dara Tango was swamped on the run-in by Casimir Road (7-2).
Though only narrowly ahead at the last, Dara Tango looked set for a huge effort, but Casimir Road skipped through the mud under Paul Carberry to land the spoils by a length.