The moment comes from Harry Potter and the Chamber of Secrets, the 2002 film adaptation of J. K. Rowling’s second novel. During the Hogwarts dueling club sequence, Professor Snape, played by Alan Rickman, casts Expelliarmus against Gilderoy Lockhart and sends him flying backward. The scene helped establish the Disarming Charm on screen before it became one of the franchise’s most familiar spells. Short clips of Snape’s delivery remain popular in fan edits, reaction videos, and playful magical battle posts.