Ben Dalton completed a 2,277-1 double at Kilbeggan when booting home By The Banks in the Midland Breeders Supporting Kilbeggan Beginners Chase.
With favourite Steps To Freedom already well beaten approaching the last, Dalton was poised behind the leader and struck for home soon afterwards.
Denis Cullen's 66-1 outsider belied his odds to keep ahead of the fast finish of Georges Conn, landing the spoils by a neck.
Cullen said: "He looked like he was going to win in Tramore earlier this year. He fell at the second last then, and it seemed to give him an awful fright.
"Then with fast ground over the summer things didn't go his way. I threw him out in the field for a fortnight and he's come back freshened up well.
"He's from a good family - a half-brother to Tell Us More.
"He's a brilliant horse to jump and Ben gave him a grand ride. He followed instructions which is what you want."
Dalton's decision to duck up the inside of the track on Star Power paid dividends as they got up late to cause an upset in the Martinstown Opportunity Handicap Hurdle.
A bunch of horses jumped the second last with a real chance of success, though He Is Top Class emerged as the leader at the last.
Dalton got a real rattle out of Star Power after the final flight, though, and after squeezing up the inner on Desmond McDonogh's 33-1 chance, he ran on strongly to score by half a length.
McDonogh said: "He was trapped in and I thought he was never going to get out but thankfully it worked out.
"He got injured in Galway last year, and it took nearly a year to get him back.
"He's turned inside out since Galway this year, and that's a nice prize to get. He's entered at Galway on Tuesday and may go there."
Both Jack Kennedy and Ricky Doyle were taken to hospital for x-rays after falls in the first and third races on the card.