Jelly-Legs Jinx

The Jelly Legs Jinx makes peoples legs wobble, so that they can not stand on their feet. The incantation is unknown. When the jelly legs Jinx is mixed with the Furunculus Curse, people sprout little tentacles all over their face. Crabbe was hit by this combination cast from Harry and George on their ride home on the Hogwarts express. Hermione used the jinx on Harry as he was training the Shield Charm for the third task.