|Nadia Comaneci in 1976|
The then ponytailed 14-year-old's routine was so exceptionally good, and so unexpected, that a scoreboard had yet to be devised that could record such perfection. So officials flashed up "1.00" and it took the announcer to notify the crowd that those digits actually meant a perfect 10. The crowd erupted.
Check out Nadia Comaneci's historic performance at the 1976 Montreal Summer Olympics below: