Horns, horns, horns, in dark Mindolluin's sides they dimly echoed. Great horns of the north wildly blowing. Rohan had come at last.
Too bad that's just fiction, because I always get chills even thinking about it. The whole Battle of Gondor, particularly that one, and Gandalf's stand at the ruined gates, and of course the slaying of the Lord of the Nazgul.