Wigan pulled off a shock win at Arsenal to boost their Barclays Premier League survival hopes.
Franco Di Santo fired the Latics - who last week beat leaders Manchester United - ahead on the break after seven minutes, before Jordi Gomez doubled their lead inside 90 seconds.
Thomas Vermaelen reduced the deficit with a bullet header on 21 minutes, but the second-half onslaught from the shellshocked Gunners never came as the Latics moved five points clear of the relegation zone.
It had been a bright start by Arsenal, who were looking to tighten their grip on third place, as Yossi Benayoun forced Ali Al Habsi into a fingertip save from his close-range header.
The Latics had brought a small following of only some 200, who had perhaps travelled more in hope than genuine expectation.
The Emirates was left in stunned silence, with midfielder Mikel Arteta then limping off injured and replaced by Ramsey in the ninth minute.