Championship side Burnley kicked Premier League team West Bromwich Albion out of the FA Cup, by beating them 3-1 in their fourth round replay.
Wade Elliott opened the scoring at Turf Moor, and Steve Thompson netted a double to set up a fifth round clash against Arsenal or Cardiff City.
West Brom's only goal of the match came from Gianni Zuiverloon.
It's the fourth time this season that Burnley have wowed fans by beating a Premier League opposition.
In the Carling Cup, they made it to the semi-finals with unexpected wins over Chelsea, Fulham and Arsenal before being narrowly beaten by Tottenham.
After their victory over West Brom, Burnley manager said he thought his team deserved to win.
"It's probably the best (upset) because it's the one that counts just now and the Carling Cup is finished," he said.
"We'd love to have an FA Cup adventure similar to the Carling Cup and I stressed that to the players. Each and every game we want to win."