The line comes from The Lord of the Rings: The Return of the King, where King Théoden rallies the Rohirrim before the Battle of the Pelennor Fields. In the film, he rides along the ranks of horsemen, urging them forward against overwhelming odds, and the charge that follows became one of the trilogy's most quoted battle scenes. Clips of the shout spread through fan edits, reaction videos and gaming montages, where its old-world language and desperate courage make even a small moment feel monumental.