The Warg Attack scene in The Lord of the Rings: The Two Towers is a fan favorite for its perfect build-up and music, despite it not being in Tolkien's book. Peter Jackson added the scene, originally planned for Edoras, but moved it to the journey to Helm's Deep due to filming challenges. The scene was created last minute with CGI Wargs, posing difficulties for actors who had to perform without physical creatures. Despite this, the CGI held up well, and the scene has become highlight of the film!