Aragorn: Stand your ground, stand your ground! Sons of Gondor, of Rohan, my brothers! I see in your eyes, the same fear that would take the heart of me. A day may come, when the courage of men fails, when we forsake our friends, and break all bonds of fellowship, but it is not this day. An hour of wolves, and shattered shields when the age of men comes crashing down! But it is not this day! This day we fight! For all that you hold dear, on this good earth, I bid you stand, men of the west!
Legolas sends an arrow directly to Grima atop Orthanc, and as Grima starts to fall back the arrow is quite visibly well below the coat's fur. However, when Grima actually hits the ground, the arrow is now higher up, protruding from the fur. (Extended Edition.)
Sam's line at the end of the film ("Well, I'm back") is also the last line of the "King" novel.