Lord Voldemort is the main villain of the Harry Potter books and films, played in most of the movies by Ralph Fiennes. His screams became a reusable reaction sound because they appear during some of the series' biggest confrontations, especially as his plans collapse. Clips of those moments circulated on video platforms and soundboards, where editors isolated the yelling from the dialogue and music. The result is now used less as a film quote and more as a universal symbol of furious disbelief.