|"Are you a wizard or not?"
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This hex caused the victim's knees to reverse position from the front of their legs, where they were supposed to be located, to the back.
- Torquil McTavish had this spell used on him in 1754, during a broom race.
- Gertie Keddle used this hex when a man playing an early form of Quidditch came to her garden to retrieve his ball.