Estonian Kelly Sildaru became the youngest freeski halfpipe world champion in history as she claimed gold with a superb display at the International Ski Federation Freestyle Ski and Snowboard World Championships in Utah.
The 16-year-old teenage sensation landed a switch 1080, the first time it has been successfully performed by a female skier, on her way to scoring a huge total of 95.00 points at Park City Mountain.
Reigning Olympic champion Cassie Sharpe of Canada had the chance to overtake Sildaru and deny the Estonian her moment of history but failed to land her top trick in her final run.
Sharpe's earlier score of 94.40 points was enough for silver and the bronze medal was claimed by American Brita Sigourney on 90.60.
"I still can’t believe it," said Sildaru.
"I wasn’t sure if I should go for a switch 1080, because I simply haven’t tried it before and I didn’t know if I was going to land it.
"I decided to save it for my last run and I did it.
"I’m shaking right now, because I’m so happy."
Aaron Blunck of the United States retained his freeski halfpipe title after he scored 94.20 points to clinch the gold medal on home soil.
The 22-year-old Winter X Games gold medallist finished top of the standings ahead of Frenchman Kevin Rolland, who earned silver on 93.80 points.
Noah Bowman of Canada sealed the bronze medal with a best score of 91.60 points.
France's Perrine Laffont maintained her recent dominance of the dual moguls competition at major events as she defended her world title to add to the Olympic gold medal she won in Pyeongchang last year.
Laffont, who had earlier claimed moguls bronze, beat Jaelin Kauf of the US in the big final to secure her second world title.
Kauf was forced to settle for the silver medal as her compatriot Tess Johnson won the small final to take bronze.
"It’s crazy to win back-to-back golds," said Laffont.
"I was a little bit disappointed and frustrated after last night, but today I just kept pushing myself in every run.
"And Deer Valley is always a good show, so when you perform here it’s always the best victory ever.
"I couldn’t be more proud of myself - I’m not always proud, but tonight I am."
Canadian Mikaël Kingsbury lived up to his pre-event billing as the favourite in the men's event as he added dual moguls gold to the moguls title he claimed yesterday.
Kingsbury, the reigning Olympic moguls champion, defeated American Bradley Wilson in the big final to further cement his status as the best moguls skier on the planet.
Wilson was left with the silver medal and Daichi Hara of Japan rounded off the podium with the bronze medal.
Victory for Kingsbury saw him move to the top of the all-time list for the most World Championships gold medals, overtaking American Hannah Kearney.
This year's World Championships are due to conclude with the snowboard slopestyle finals for men and women tomorrow.