Nico de Boinville and Whisper just saw off Tony McCoy on Get Me Out Of Here in a thrilling race for the Coral Cup at Cheltenham.
There was nothing between them up the hill, but it was Whisper (14-1), trained by Nicky Henderson and owned by Dai Walters, who prevailed by a short head.
Bayan was two and a quarter lengths away in third, with Smashing fourth.
The pace was set by Son Of Flicka, the winner in 2012, and Clondaw Kaempfer, as 28 horses set off for the highly-competitive handicap hurdle.
As to be expected there were many in with chances coming to the final flight, and it was De Boinville, a 5lb clamer noted for his riding of Sprinter Sacre in his work, who had Whisper in the right position to deny Get Me Out Of Here, who has now finished second at four Festivals.
De Boinville, who was riding his first Festival winner, said: "You can never be too sure (in photo-finishes) but I'm over the moon.
"I got a lovely position and he kept going all the way."
Hawk swoops in to take juvenile handicap hurdle
Hawk High swooped in the Fred Winter Juvenile Handicap Hurdle.
Trained in Great Habton by Tim Easterby, the Trevor Hemmings-owned four-year-old sprang a 33-1 surprise under Brian Hughes.
Hughes had been criticised in certain quarters for his ride aboard Attaglance in a Listed race on Tuesday, but timed things nicely here.
Clarcam's fall two flights out caused plenty of mayhem, a consequence of which saw Orgilgo Bay gain a definitive lead.
But Hawk High was not to be denied as a tidy jump at the last sealed the deal.
Katgary, who had been hindered by Clarcam's fall, stayed on to take second spot, three-quarters of a length in arrears.
Orgilgo Bay was third, while Keltus was also a slightly unlucky fourth.