The sound comes from Harry Potter and the Deathly Hallows Part 2, released in 2011, where Lord Voldemort, played by Ralph Fiennes, believes he has finally killed Harry and announces it to Hogwarts. The scene was meant to be triumphant and terrifying, but his stilted laugh quickly became a meme online. Clips, GIFs and edits isolating the announcement and giggle spread across social media and forums, often paired with unrelated failures or mock victories. Its lasting appeal is that awkward delivery, which turned a climactic villain speech into a reusable joke.