Racing:Clopf was denied a second victory over fences when he slithered to the ground after the last, handing the Kevin McManus Flyingbolt Novice Chase at Navan to 50-1 outsider Maralan.
Trained by the colourful Oliver Brady, the seven-year-old landed the Grade Two prize in the hands of John Cullen.
The victory provided a welcome success for the trainer, who recently required a quadruple heart-bypass operation.
Edward O'Grady's Clopf, a Grade one winner over hurdles, appeared to have the race in the bag but a slight error at the last caused him to lose his footing.
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Dark Artist was three-quarters of a length away in second — another sign that Noel Meade's horses are returning to form, while 11-8 favourite Scotsirish stayed on well for third.