England's David Howell stormed to 11 under late on Friday to overhaul Nick Dougherty after two rounds of the PGA Championship at Wentworth.
-11 D Howell
-8 N Dougherty
-7 A Cabrera (Arg), R Karlsson (Swe)
-6 S Khan
-5 L Donald, P Casey, F Delamontagne (Fra)
-4 N Fasth (Swe), R Jacquelin (Fra), MA Jimenez (Spa)
GB&I unless stated
Howell fired 65 in calm conditions to lead Nick Dougherty (69) by three shots after a morning of rain and wind.
Defending champion Angel Cabrera and Swede Robert Karlsson were seven under with England's Simon Kahn six under.
Co-overnight leader Luke Donald aced the second but ended five under with Paul Casey and Francois Delamontagne.
Howell, the European Order of Merit leader, dropped a shot at the third but hit back with eight birdies, including three in the last four holes.
"That was one of the best rounds of golf I have played," he said.
"Things went my way and when I hit a poor shot I managed to extricate myself. I rode a crest of the wave until the end."
The 30-year-old, who has suffered from back problems recently, beat Tiger Woods head-to-head in Shanghai in November, but said: "This would be a bigger win in my mind."
I dreamt I had won it last night and was very disappointed when I woke up
The 24-year-old Dougherty was one of four overnight leaders, along with Donald (72), Casey (72) and South Africa's Andrew McLardy (74).
But he romped into an early lead with birdies at the 8th, 12th, 14th, 17th and 18th before admitting he had dreamt he had already won the event.
"I was very disappointed when I woke up," said Dougherty. "I won, it wasn't even a contest, I beat Luke (Donald). I think I shot 63 on the last day and he only shot 70."
Dougherty revealed he often dreams about golf.
"Oh yes, all the time. God knows, I've won so many Opens," he said. "Maybe that's a bit dull that I dream about golf.
"For me, the biggest thing I could ever achieve in my life, with the exception of hopefully being married and having children, would be to win majors and in particular the Open."
Donald, who missed out a special prize for his ace - a car was available for holes-in-one on the 14th - fell back with three bogeys on the front nine and a double on the 15th for 72.
Ireland's Padraig Harrington rocketed to two under with an eagle three at the 18th, while playing partner Colin Montgomerie made the cut after a level-par 72 kept him at one over.
The greens were unplayable for me
Course designer Ernie Els
Wentworth local Ernie Els, who was responsible for the changes made to the West Course, carded 74 to end on one under.
"We've done all the work on everything else, but unfortunately with this weather putting was like running against a wall," said the South African, who added 300 yards and 30 bunkers to the course.
The one-shot penalty given to Ulsterman Darren Clarke on Thursday for dropping his ball on his ball-marker on the 13th hole put him out of the tournament.
Clarke and England's Ian Poulter were among those who just missed the half-way cut on three over when the second round was completed on Saturday morning.
Twelve players had been unable to finish the previous night following a 60-minute rain delay and it needed only one of them to finish at two over or better for those at three under to crash out.
England's Richard Bland did the damage as he finished first on Saturday morning, picking up two birdies to complete his remaining three holes for a 68 and a three-under total.
Clarke had headed straight for hospital to visit his sick wife Heather after three-putting the final hole in his round on Friday.
Lee Westwood definitely missed out after a 75 for five over, while last week's Irish Open winner Thomas Bjorn, former Open champion Ben Curtis and world number nine Adam Scott of Australia will also sit out the weekend.
It was Westwood's fifth successive missed cut and looks to have cost him a place in the US Open.