A charge like that of electricity runs through the body of a wizard with this automatic defensive spell.


In 1995, Vernon Dursley tried to hold Harry around the neck, when he felt a sudden charge like electricity running through Harry and he had to drop him. This appears to have been an automatic defensive response on Harry's part, since there is no indication that he intentionally cast a spell.

In 1996, Albus Dumbledore used a similar spell to make Dolores Umbridge let go of Marietta Edgecombe, whom she was shaking violently. This may be a different form of the spell, however, since Dumbledore used his wand to perform it, and it said that Umbridge was waving her hands around like they had been burned.

It is also possible that this is the spell that Narcissa Malfoy used against her eldest sister Bellatrix Lestrange, when the latter tried to stop her from approaching Severus Snape for assistance.