The 23-year-old, born in Alaska and raised in Switzerland before relocating back to his home nation in the state of Utah, put together a routine that earned him 90.01 points and ultimately the title of Olympic champion.

A unique run sealed him the title, with the world bronze medallist even throwing in a perfect bump on one of the slopes, finishing off with a pretzel rotation on a double corkscrew.

He said it was his best-performance ever in the event.

"It definitely was the best slopestyle run I've ever done, mainly because it embodied everything I love about skiing and how I approach skiing and I didn't fade away from that to try and maybe get bigger scores or something," said Hall after the event.

"I just kept it true to myself, and I think the most important part about our sport is just doing it for the love and doing it how you want to do it and not changing that.

"Honestly I was really, really surprised I landed the first run. 

"I had done some parts of the run, but definitely not the whole thing altogether.

"That last jump was definitely maybe my hardest trick."

Goepper claimed the silver with a second-run score of 86.48.

The 27-year-old won silver at Pyeongchang 2018 and bronze at Sochi 2014.

Bronze went to Sweden's Jesper Tjäder who also made the top-three on his opening run, scoring 85.35.

It was a 20-place improvement on his run from the 2018 Games.

Andri Ragettli of Switzerland, who topped qualifying, put together two consistent runs, but lacked the extra points needed for the medals, finishing with a best of 83.50.

Big air champion Norwegian Birk Ruud was fifth, moving up the standings with a solid final run after two messy routines.