The 'Turn To Page 394' meme is derived from a memorable scene in the 2004 film 'Harry Potter and the Prisoner of Azkaban.' In the scene, Professor Severus Snape (portrayed by Alan Rickman) abruptly takes over a Defense Against the Dark Arts class and commands the students to open their books to the section on werewolves. The meme gained popularity due to Rickman's distinct, dramatic delivery of the line, which has since become a shorthand for any situation involving a sudden, authoritative, or unwelcome instruction. Fans use the template to joke about school assignments, unexpected life changes, or simply to celebrate the iconic presence of one of cinema's most beloved anti-heroes.