The combined Danish and Swedish tug of war team at the 1900 games was short a man, so they asked Edgar Aaybe, a Danish journalist covering the games, to join in. He became a gold medal winner.
In 1912, Japanese marathon runner Siso Kanakuri disappeared during the race through Stockholm and wasn't accounted for until 50 years later.
The 1912 Greco-Roman wrestling match in Stockholm between Finn Alfred Asikainen and Russian Martin Klein lasted more than 11 hours.
In 1976 Japanese gymnast Shun Fujimoto shattered his kneecap during a floor routine. Telling no-one, his final discipline, the rings, meant a landing from a height of several metres.
He landed flawlessly, held his position for the judges, then collapsed in agony.
Japan won gold.
Australian Henry Pearce was leading the 1928 single sculls rowing event when a line of ducks passed in front of him.
He stopped, let them pass, then continued to victory.