The Australian men's kayak four, surf lifesavers before taking up the sport, ended Europe's stranglehold when they grabbed gold at the Olympic canoe regatta.
The crew of Tate and David Smith, Murray Stewart and Jacob Clear fired off the start to beat favourites Hungary and Germany amid a cacophony of noise from the grandstands.
Roared on by a huge Hungarian contingent on the banks, the eight kayaks came through the last 100 metres with bodies straining forward, arms whirling, legs driving and water splashing everywhere as Australia prevailed in a close finish.
The race was the only one to go against the form book at a regatta dominated by the fight between Germany and Hungary.
With two days of finals complete, the sport, which is often overshadowed by its more illustrious sister rowing, has awarded eight gold medals, three to Hungary and three to Germany.
Norway took a gold on Wednesday.
"We knew we could do it," Tate Smith told reporters having helped lift Australia to 10th in the overall medals standings after a disappointing London Games so far.
"We've been able to put four good guys together. We were close in Beijing, and were really close in K4s, but we have just worked really hard - it's been our focus and our priority.
"We had this belief for the last three years and it's the biggest race of our life. It's unbelievable.
"Australia's first gold in a team boat - that's massive."
The victory against the traditional European powerhouses is all the more impressive as canoeing in Australia receives less funding than most other Olympic sports.
They took a gold and two bronzes in Beijing and have been boosted in recent years by surf lifesavers such as the four in the K4 moving into sprint flatwater canoeing.
"Day 13 and you finally want to talk to me," an Australian press officer said to reporters after the country failed to take a gold in rowing on the same course last week.
On Day 13, the four men linked their arms and raised them to the skies as they stood on the podium, four years after David Smith wept after failing to make the Beijing final.
He said the Aussies' strategy was simple.
"Just keeping the pressure on the other teams. We knew we could get out quick and stay in front. That was the whole idea of it," Smith said.
"We knew from last year we were one of the best crews, and we knew if we got the race plan right we would be hard to beat, and that's what we did."
Earlier, Alex Haas and Jake Donaghey came third in the B Final of the men's C2 1,000m event.
"Our goal was to make the A final, but we did think that the B final was probably where we were at this time around and we're happy with our performance," Haas said.
"We were really focusing on getting that kick at the 500-metre mark and really working the last 250m - and that worked."
Donaghey said it was all part of the Olympic learning experience.
"In the heat and the semi there was maybe some things we could have done better but that's what this is about," he said.
"We're only 17 and it's all about learning and getting ready for 2016. This race was a massive improvement on what we did two days ago."
In the remaining races it was more business as usual.
Germany's Peter Kretschmer and Kurt Kuschela won the men's canoe double after they surged through the field in the middle of the race to beat the defending champions Andrei and Aliaksandr Bahdanovich of Belarus who took the silver.
In the women's events, Hungary's Danuta Kozak overcame a sleepless night to come from behind to also beat the defending champion, Ukraine's Inna Osypenko-Radomska and add to the gold medal she won in the women's K4 on Day 12.
In the final race of the day, however, Hungary failed to gain from their huge crowd support when Germany's Franziska Weber and Tina Dietze raced through their fierce rivals to claim the gold and make up for their defeat in the K4.