Two stunning jumps from Australia's Dale Begg-Smith helped him to gold in the men's moguls event in Sauze d'Oulx.
Begg-Smith is competing in his first Olympics
The Canadian-born 21-year-old finished with a score of 26.77, to stay clear of Finland's Mikko Ronkainen in silver and Toby Dawson of the US in bronze.
Begg-Smith, an internet entrepreneur, is the third Australian to win gold at a winter Games.
Alisa Camplin won the women's aerials in 2002 and Steven Bradbury took the 1,000m speed-skating gold in Salt Lake.
Begg-Smith led the qualifying round and carried that form into the final where, starting last, he held his nerve to take victory.
"I'm very happy - I never expected this to happen," he said.
"It was important to keep clean and consistent runs and the bottom line landing was also important."
America's Jeremy Bloom, who is destined for an American football career and is due at an NFL training camp in Indianapolis next week, finished out of the medals in sixth spot.
Begg-Smith, who has four World Cup wins to his name, was 13 when he formed his internet company with his older brother Jason.
Jason also competed in Wednesday's freestyle moguls, but missed out on the finals with a qualifying score of 20.22.
The brothers left Vancouver for Australia in 2000, after Canadian moguls officials said they did not want them to miss training to handle their business.