Carlow man Padraig Amond steered home a superb strike to help Newport County dump Middlesbrough out of the FA Cup and set up a dream fifth-round tie with Manchester City.
The former Shamrock Rovers and Sligo Rovers man bent a brilliant effort into the top corner on 67 minutes to double the hosts lead - his 18th goal of the season - after Robbie Willmott had broken the deadlock two minutes into the second half.
With Dubliner Mark O'Brien immense at the back, and the tireless Amond a constant menace, Newport were full value for this win, which could and perhaps should have been more emphatic.
The League Two minnows outfought and out-thought the visitors, and can now look forward to welcoming Pep Guardiola's star-studded side to Rodney Parade in the next round.
"Credit to the (assistant manager) Wayne Hatswell and the staff for coming up with those set pieces," said Amond. "I connected with it really, really well and I was just thankful it flew into the top corner.
"It’s what you work hard for, I work as hard as I can in training every day for games like this so the more that come the better for me. I’m just loving my football and really enjoying things."
It was a thoroughly miserable evening for Tony Pulis, who was brought up just a few miles away from the tight, old-fashioned ground.
But the Boro boss can have no complaints as his side were second best in every department in joining a recent list of Rodney Parade cup casualties that also includes Leeds and Leicester.
Heavy rain had made conditions difficult but the two sides soon settled down to producing an absorbing tie, played at a frenetic pace.
Jonny Howson fizzed the first opening wide but Boro were fortunate to survive a strong penalty appeal for handball and a goalmouth scramble in the space of a minute.
Dimitrios Konstantopoulos was grateful to drop on the ball on his goal-line after Jamille Matt and Amond both stabbed goalwards without conviction.
The Greek goalkeeper had to be alert again to stop an Amond header looping in at the far post, but Boro were almost ahead when Jordan Hugill raced on to Howson's pass and struck the outside of the post from 20 yards.
But it was County who carried the greater threat and, after Konstantopoulos' face came to the rescue by denying Amond from close range, Joss Labadie just failed to connect with Regan Poole's cross.
Willmott was a constant danger down the right and another fine run and cross from the winger ended with Konstantopoulos pushing out Amond's point-blank header.
Matt sent another header on to the roof of the net and Boro were relieved to get to the interval still level.
But parity did not last for long as Willmott, collecting the ball just inside County territory, advanced to the edge of the area and unleashed a 20-yard drive past Konstantopoulos' despairing dive.
Pulis turned to his bench quickly to make three substitutions but Boro huffed and puffed after County sealed matters with Amond, who had scored the winner in the previous round against Leicester, showing his goal knack again.
Exiles boss Michael Flynn thinks Newport will make £1m from this cup run, with more TV money against City to come.
But, for now, it is all about the glory and County fans were celebrating one of the club's most memorable nights wildly at the final whistle.
Amond added: "The manager must be pulling his hair out with our league form and we just seem to up our game for these nights.
"And you can see with a crowd like that behind you how big a help it is. It’s just an unbelievable feeling and it’s not a fluke because we could have been two or three up at half-time and we fully deserved the victory."