Jelly-Legs Curse

"Jelly-Legs Curse: Point your wand directly at your enemy and shout Locomotor Wibbly!"

- Vindictus Viridian, Curses and Counter-Curses.

The Jelly-Legs Curse, also known as the Jelly-Legs Jinx (Locomotor Wibbly) is a spell that causes the victim's legs to collapse.

Known Uses

 * Hermione Granger used this spell on Harry Potter while he was practicing the Shield Charm for the Third Task of the Triwizard Tournament.
 * Vincent Crabbe was hit with this jinx, in combination with Furnunculus, by Harry and George Weasley, causing little tentacles to sprout all over his face.

Behind the scenes

 * The Jelly-Legs Jinx seems to share some similarities with Tarantallegra, although the effects as described are slightly different; Tarantallegra makes the victim's legs thrash about uncontrollably, whereas this spell makes their legs shake.
 * In the GBC video game adaptation of Harry Potter and the Philosopher's Stone, this spell is used to immobilise the opponent.
 * This may possibly be related to the Leg-Locker Curse.
 * It is currently unknown whether this is a jinx or a curse, as it has been referred to as both.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Half-Blood Prince
 * Pottermore

Notes and references
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