The Bat-Bogey Hex

The Bat-Bogey Hex transformed the victim's bogies into large bats that would fly out of their nose. The Hex was popular amongst younger witches and wizards, particularly Ginny Weasley whose use of the Hex on a fellow student who was annoying her caught the eye of Horace Slughorn who invited her to join his Slug Club on the basis of her wizarding talent.