Spaniard Rafael Cabrera Bello was almost in a daze after an unbelievable round of 60 brought him his first European Tour title.
The 25 year old, eight behind with a round to go at the Austrian Golf Open at Fontana Golf Club in the village of Oberwaltersdorf on the outskirts of Vienna, beat England's Benn Barham by a shot - and even had a putt for a 59 on the final green.
Nobody has ever managed that on The European Tour, but although the 30 footer for eagle missed, Cabrera Bello's tap-in proved to be the winning stroke when overnight leader Barham failed with his 18 foot birdie attempt.
Just the 13th player to shoot 60 - Darren Clarke has done it twice - he was also only the third to achieve it on the final day and win.
"It's just amazing - I played the best golf of my life and I can't believe it," said Cabrera Bello, who had missed eight of his previous ten halfway cuts and had never scored lower than 64 on The European Tour.
"I was so far back I wasn't thinking about winning. I just tried to play a shot at a time and today it worked out really, really good."
A hat-trick of birdies from the third and then four in a row from the eighth brought him into the joint lead with Barham, who had been three clear of the field overnight.
The Kent golfer did not manage a single birdie in his first ten holes, but responded each time when Cabrera Bello picked up further strokes on the 13th and 14th.
Barham then found himself two behind as the Canary Islander - fourth in the 2002 Open de Espana as a 17 year old amateur - found the target again from ten feet at the 16th and two-putted the par five last for a 20 under par aggregate.
Needing to win to secure his card for next season, Barham still had a good chance when he made a 12 footer on the 16th, but a drive into the rough at the last was a costly error.
Cabrera Bello, 74th on The Race to Dubai after graduating from the Challenge Tour last year, earned €166,660, while Barham's €111,110 leaves him outside the top 115 and still in danger of a return to Qualifying School.
“Very happy with the way I played this week, obviously disappointed to finish second,” said Barham. “It’s very hard to take.”
Ryder Cup Dane Søren Hansen finished third for the second week running, while England's Richard Bland returned a 66 to move into fourth spot.