Shaun White's bid for a third consecutive Olympic halfpipe title ended in disappointment as Switzerland's Iouri Podladtchikov claimed gold.
Indeed, the American superstar did not even win a medal as he finished just outside the podium in fourth place.
Having qualified with the best score, White was the last competitor to go in Wednesday's final, but suffered two falls in his first run as Japan's Ayumu Hirano posted the early target.
But it was Podladtchikov who raised the bar in sensational style with his second run, landing his trademark "Yolo" jump - a spinning 1440-degree trick - to post a score of 94.75.
Taku Hiraoka then moved second with a run of 92.25, but he was soon shunted down into the bronze medal position by compatriot Hirano who produced another brilliant display to come up just short of Podladtchikov with a total of 93.50.
The leader's score was still less than White had managed in qualifying but, with the pressure on, the defending champion was unable to deliver with the final run of the competition.
Again the 27-year-old failed to nail his landings and, although a vast improvement on his first effort, he would finish down in fourth with a score of 90.25.
The result meant the Americans were shut out of the halfpipe podium for the first time since the sport was introduced to the Olympics in 1998.
A disappointed White stated afterwards: "Tonight was just not my time. I was looking for four (gold medals) - I was hoping to do slopestyle, too, but it didn't pan out."
Podladtchikov revealed that he had battled illness to secure his gold medal, explaining: "It feels very shaky, I'm about to faint. I've got a really bad feeling in my stomach.
"The goal was just to be able to ride. It was challenging for all of us. Shaun was ahead as usual. I was barely making the semi-final, never mind gold. It went so fast and it all happened in one day."