SpellsCharm
Liberacorpus
The counter to Levicorpus, which hooks the victim by the ankle and dangles them upside down. It is one of the scribbled notes in the Half-Blood Prince's battered textbook.
In the books
Harry Potter and the Half-Blood PrinceChapter: 12
Harry uses the counter-jinx to release Ron after accidentally suspending him upside down.