Before today, West Ham hadn't beaten Everton in the Premier League since April 2007.
That's 15 games, home and away. West Ham have been relegated and promoted in the interim, while the game was so long ago that a young Carlos Tevez was playing for the Londoners.
The record looked unlikely to go when Romelu Lukaku and Aaron Lennon gave the hosts a 2-0 lead at Goodison Park, as Kevin Mirallas' first-half red card looked not to have bothered the Toffees.
But when Lukaku missed a penalty to make it 3-0, the visitors sensed there could be something in it for them.
Sure enough, goals from Michail Antonio, Diafra Sakho and Dimitri Payet - all in the final 15 minutes - turned the game on its head and gave the Hammers all three points.
Everton fans have been frustrated by late goals already this season, not least against
Bournemouth and Chelsea, but their reaction today was on another level entirely.
https://twitter.com/GameofThrowIns/status/706161147720892416
https://twitter.com/ViewFromGwladys/status/706160674444070914
https://twitter.com/johnmerro1/status/706163598054268930
https://twitter.com/Adam_Jones94/status/706160091137970176
https://twitter.com/EFCsupporters/status/706165865432150021
Whisper it, but maybe
Joey Barton was right.