Premier League champions Arsenal were knocked out of the Carabao Cup after a stunning loss to fourth-tier Fleetwood Town following a penalty shootout on Tuesday.
Bruno Guimarães had his spot-kick saved by Jay Lynch before Fleetwood's teenage defender Conor Haughey lashed home an emphatic penalty to spark a pitch invasion at Highbury Stadium as the League Two side triumphed 5-3 in one of the greatest upsets in the competition's 66-year history.
It is the first time that reigning Premier League champions have been knocked out of the League Cup by a fourth-tier side. Eighty-four positions separate the teams in the English football pyramid.
The match finished 1-1 in regulation.
Fleetwood, 18th in League Two, dared to dream after Fulham loanee Aaron Loupalo-Bi put them in front after 21 minutes against a much-changed Arsenal side struggling to find any fluidity.
The halftime introduction of Martin Ødegaard changed the game as the Gunners looked much improved after the break, drawing level in the 50th minute when Viktor Gyökeres just about managed to turn in his first goal of the season.
But as Arsenal tuned up the the heat without reward, their frustration boiled over as their teenage prodigy Max Dowman was sent off with five minutes left to play.
There was still time for Lynch to make huge saves from Ben White and Ødegaard before it went to a shootout in which Fleetwood were perfect from the spot to secure a historic win.
After their first ever win over a top-flight side, Fleetwood now move into the quarterfinals of the competition for the first time.
Arsenal have now been eliminated in their last two League Cup ties against sides from the fourth tier of English football, having also been eliminated by Bradford City in the 2012-13 quarterfinals on penalties. The north London side won their previous eight such matchups.
Information from The Associated Press, PA and ESPN Research contributed to this report.