Rio 2016 Olympics - Two Mongolian wrestling coaches stripped off and hurled their shoes in protest when their competitor Mandakhnaran Ganzorig was denied victory for running away from his opponent in the dying seconds of their bronze medal contest.
Ganzorig, leading Uzbekistan's Ikhtiyor Navruzov by seven points to six, taunted his opponent by dancing around him in the last 18 seconds of their 65kg match and was then carried around the ring in triumph by one of his coaches.
But the judges then adjusted the score to 7-7, penalising the Mongolian for 'fleeing the hold', or refusing to engage with his opponent.
They then added a further point to the Uzbek's score when the Mongolian corner challenged the decision and had the challenge rejected.
Ganzorig crouched head down on the mat in disbelief at the reversal as both coaches advanced towards the judges, stripped off their shirts and shoes and hurled them to the floor.
One of the coaches, Byambarenchin Bayaraa, later explained his actions.
"This was a protest. There was a problem with the refereeing... Three million people in Mongolia waited for this bronze medal and now we have no medal."
The Uzbek winner Navruzov celebrated by wrestling his coach to the floor and then kneeling on the mat as if in prayer.
Anger over weightlifting decision
There's also been anger from Iranian sports fans after their biggest star failed to win a weightlifting medal at Rio.
Fans have deluged the International Weightlifting Federation with more than 1.6 million online comments, many of them abusive.
The men's super-heavyweight favourite, Behdad Salimikordasiabi, broke a world record in the first part of the competition, the snatch.
But he then failed to register a lift in the clean and jerk.
Salimikordasiabi's first attempt was a fail and his second, after being cleared by judges, was overruled unanimously by the jury of five who decided his left arm was not completely straight.
After he failed with his third attempt he was reduced to tears and his coaches claimed there had been "a conspiracy"
The IWF website was hacked the day after the men's +105kg contest and has been under attack ever since.