When Olga performed the Korbut Flip at the 1972 Summer Olympics in Munich, it was the first backwards release move ever attempted on the uneven bars.

After the boards displayed a score of 9.8, the audience began to whistle, jeer, stamp their feet, and shout vulgar remarks at the judges in disapproval, believing her score to be too low. However, the judges refused to change her score.

The Korbut Flip on uneven bars is no longer allowed in gymnastics competition because it involves standing on the high bar, a manoeuvre which is now illegal in the Code of Points.
 

(Health24, August 2012)