Andreas Wellinger produced a stunning second leap after midnight here to become the first German winner of the men's Olympic ski jumping normal hill event for 34 years at Pyeongchang 2018.
It was Germany's second gold medal on the opening day of these Winter Olympics after Laura Dahlmeier had earlier won the women's biathlon 7.5 kilometres sprint.
Wellinger, winner of a team gold medal at a teenager at Sochi 2014 but who had never won a global individual title, showed ominous form in topping the standings in yesterday's qualification.
The 22-year-old only placed fifth in the first round of today's final as the biggest names in the sport came to the fore at the Alpensia Ski Jumping Centre.
But then, with the clock showing 00.18am on Sunday morning, Wellinger produced a huge second leap of 113.5 metres under the floodlights to shoot up the standings and take the lead with a total of 259.3 points.
He became the first German to win the event since Jens Weißflog did so for East Germany at Sarajevo 1984.
Norway's Johann André Forfang finished second with two solid leaps for a 250.9 points total.
Team-mate Robert Johansson had also shot up the standings from 10th after round one for a points total of 249.7.
He also managed 113.5m in the second round.
There was crushing disappointment for the Polish duo who had led after the first round.
Defending champion Kamil Stoch fell from second to fourth and Stefan Hula dropped from first to fifth.
They finished on respective scores of 249.3 and 248.8 points.