Dolphin Vista plugged on admirably on the stands side to cause a 50-1 upset in the Betfred Cambridgeshire at Newmarket.
The Martyn Meade-trained four-year-old got home by a length and a half in the hands of 3lb claimer George Wood from 100-1 outsider Sands Chorus, who was on the opposite side of the track.
Cote D'Azur (50-1) was a neck away in third, and the winner's stable companion Chelsea Lad another length back in fourth.
The 34-strong field split into two groups, with Sands Chorus leading from the outset on the far side, while Sinfonietta, Qassem and Mulligatawny were to the fore near the stands rail in the early stages.
When they faded, Dolphin Vista came through with a winning run.
Wood said: "That was good and a little bit unexpected as he was a big price.
"Fair play to the team, they've done a really good job at home to get him back in good form.
"I wasn't 100 per cent sure I'd won (crossing the line), but I knew I was in with a good shout.
"I was a bit worried early on that we were on the wrong side, but he's a game horse and picked up nicely."
Meade said: "It always is a surprise. In a handicap with 34 runners, anything can happen.
"The horse has been doing really well at home. We've taken a lot of time with him.
"He's had quite a lot of racing, but had only run once for us before and we thought we'd give him time and wait for his ground.
"You have to run him in a contest like this, which is quite tricky with so many runners as so many things can go wrong, but he came home the winner, which is great.
"It was a great ride from George. He stuck to his guns where he was and did everything we asked him to do."
Aidan O'Brien won the Cheveley Park and Middle Park for the Coolmore team with Clemmie and U S Navy Flag respectively, and completed a treble when Bye Bye Baby got off the mark on her fourth start in the Blandford Bloodstock Maiden Fillies' Stakes in the hands of Ryan Moore.
Very few got into the seven-furlong heat as the 11-10 favourite was taken straight to the front and was joined by her market rival Altyn Orda.
They dominated proceedings, with Bye Bye Baby asserting in the closing stages to strike by two lengths from the 2-1 second best. Princess Harley was five lengths away in third.