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The Knee-reversal hex (incantation unknown) caused the victim's knees to reverse position from the front of their legs, where they were supposed to be located, to the back.
|Gertie Keddle||1100s||Gertie Keddle used this hex when a man playing an early form of Quidditch came to her garden to retrieve his ball.|
|Unknown||1754||Torquil McTavish had this spell used on him during a broom. race.|
|August, 1877||Angelus Peel had this spell used on him in the Tournament that Nobody Remembers|