American gymnast McKayla Maroney crossed her arms and pursed her lips tightly as she stood on the podium.
The overwhelming favourite to win a gold medal in vault was obviously unhappy to finish second, next to Olympian champion Sandra Izbasa from Romania.
Maroney, 16, managed to hold back the tears as a foreign national anthem played during the victory ceremony. It took 30 minutes for her to crumble and begin to cry.
"I just wanted to prove to everybody that I can hit two vaults and do my best for [the US], that's what I'm disappointed about," she told the New York Times, as her eye make-up ran.
"Just about how I trained so hard and, just on this day, it didn't go."
Maroney was set to win the event by a landslide, but got silver after landing on her bum on her second vault.
She had nailed her first vault, the Amanar, one of the hardest manoeuvres in the sport, for a score of 15.866 points.
The move consists of the gymnast performing a round off on to the takeoff board, followed by a back handspring and a 2.5 twist in the air before landing.
That night, Izbasa had only scored 15.1 points for her vault, which tied her for eighth best.
But during her second vault, Maroney's hand did lot land on the table soundly and she couldn't propel herself high enough to complete her twist and flip.
She landed on her heels and her legs quickly slipped out from under her.
Maroney looked shocked, and the crowd gasped.
She got a score of 14.3, giving her an average of 15.083. Izbasa won with a score of 15.191 points, while Maria Paseka of Russia finished third with 15.050 points.
She told the New York Times that her coach stated the obvious: "There goes your gold medal."
Her defeat came just five days after she helped the United States team win gold, the first time since 1996.
She performed so well in the team competition, US women's gymnastics coach John Geddert said her top vault should be renamed "the Maroney" because "it's in a different league".
Maroney later said she didn't blame her mess up on anyone else.
"It happens," she told the New York Times. "It's gymnastics, and you can't be perfect. Sometimes, things don't go as planned."
On Twitter, she said: "Disappointed on how today turned out, but everything happens for a reason!! #noregrets.
"Plus, the silver medal is actually pretty sick!!"
- © Fairfax NZ News