Harry Potter: Unforgivable Curses - Killing Curse - Avada Kedavra
The Killing Curse (also known as the Avada Kedavra Curse) is a spell that causes instantaneous death and is one of the three Unforgivable Curses.
reference: http://harrypotter.wikia.com/wiki/Kil...
A compilation of footage from:
Harry Potter and The Goblet of Fire
Harry Potter and The Order of the Phoenix
Harry Potter and The Half-Blood Prince
Harry Potter and The Deathly Hallows Part 1
Harry Potter and The Deathly Hallows Part 2
clips credited to Warner Brothers, Inc.