Amateur League side Newington YC pulled off one of the biggest shocks in Irish Cup history by beating Premiership giants Glentoran 1-0 at the Oval.
Neil Quinn pounced for the goal in the 24th minute, shooting in from close-range after the Glens had failed to cut out Chris McFall's throw-in.
It was a huge embarrassment for Scott Young's Glentoran who are out of the running for league honours.
"I thought we had a chance of an upset," said YC manager Eamon McCarthy.
"Glentoran have not been having a great season and confidence may be low.
"It is the greatest day our club has ever had, but I feel for Scott Young and hope he is given the chance to turn things round.
"Glentoran are a massive club in the Irish League. For me, to manage at the Oval was a privilege and to win just eclipses everything."
Newington, who were 20-1 outsiders for the match, did come under pressure in the second half but nothing went right for Glentoran.
Darren Boyce completely missed his kick when presented with a great chance to equalise and the same player saw a header pawed away Newington goalkeeper Dean Smyth.
Newington, Amateur League Premier Division title holders for the past three seasons, now play Dungannon Swifts away in the sixth round.