Cause Of Causes made light work of very testing conditions to give Ireland victory in The Ladbroke at Ascot.
The Gordon Elliott-trained four-year-old sprouted wings between the last two flights, as gallant top-weight Petit Robin appeared as if he had done enough.
Davy Condon's mount looked as if he had just joined in and rattled past Nicky Henderson's runner after the last, winning by four lengths from his fellow 25-1 chance.
Elliott said: "We were worried about the ground, but we thought he had a right chance if he did handle it.
"We brought him over a couple of days earlier as he's not a great traveller. The lads have worked with him at home and everyone has done a great job with him.
"We're not bothered what the handicapper does now as this was a good pot. He's a gentleman of a horse to deal with and it's nice to win a high-profile race.
"He could maybe go for the Betfair Hurdle at Newbury and could even be a horse for something like the Ebor in the summer."
Condon, who was given a four-day whip ban (January 6-9), added: "He wouldn't be in love with that ground but he had to go through it like the rest of them.
"He's so genuine and when I pulled out wide up the straight he flew. I was struggling turning in but when I pulled him out, he took off. I thought at the second-last I would win.
"He deserved a big one. He's been second in a Galway Hurdle and third in the Greatwood."
31 July 2015Warrior books Ebor ticket
Muthmir makes amends
Hughes at his best on Bay
Pacy Muthmir rules in King George
Mile proves golden for Beloved
Malabar stamps her class
Dettori guides Dubday to landmark
Breizh bids for Galway glory
Charlton so Close to historic win
Pharoah Phan Phestival good to go
Diamonds ready to sparkle in Nassau
Jack's the lad in Galway Hurdle
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Laviniad gets up late in Corrib
Simple for Beckett and Bentley
Orange pips Goodwood rivals
Shalaa dazzles in Richmond
Relief for Hughes as Gibeon strikes
Cover up for Goodwood defence
30 July 2015Clown gets serious at Galway
Eddery aiming for Mile high
Fox finale for Hughes
Ivory unveils strong Stewards' team
Treacy sent for scans
Stars on show in Nassau
Lynam 'proud' of Sir Peter alliance
Tributes pour in for O'Sullevan
It's Shanahan's turn at Galway
Sir Peter O'Sullevan dies, aged 97
Kachy not for catching in Molecomb
No Sussex regrets for O'Brien
Solow flying high at Goodwood
Highland reels in Gordon rivals
Shalaa in top trim for Richmond
Dunlop excited by Trip to Goodwood
29 July 2015Fortune favours Twiston-Davies
Peacock pair vie for Galway glory
Moviesta gets King George go-ahead
Karakontie has Deauville date
Dog delivers for Mullins and Walsh
Tint proves Topaz jewel
Maguire back in the saddle
Blue back with a bang
Tough Toormore takes Lennox glory
All roads lead to Arc for Postponed
Logan shines for Kirby
Frankie grabs Gold at Goodwood
So seeking Sussex success
28 July 2015King targeting Molecomb reign
Mullins hoping Bob is back
Wayman lands BHA role
Medrano eyeing Gordon glory
Options open for Force
Group race aim for Nisser
Modem takes control
Solitaire shines in Weld double
Bach in business
Vastonea out to sparkle in Topaz
Tanzeel unlikely for Cup date
Birch bids for Vintage victory
Toor targets Lennox triumph
Gleneagles misses Solow clash
Charlton eager for Golden Test