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.)
In the extended version when Grima Wormtounge stabs Saruman in the back on top of the tower, Christopher Lee corrected the crew on the fact that when a person is stabbed in the back of the chest, they do not scream (as the film crew wanted), in fact the air is pushed out of their lungs and they "groan" with an exhalation of air, very quietly, as their lungs have been punctured. From Peter Jackson's DVD commentary: "When I was shooting the stabbing shot with Christopher, as a director would I was explaining to him what he should do...And he says, 'Peter, have you ever heard the sound a man makes when hes stabbed in the back?' And I said, 'Um, no.' And he says 'Well, I have, and I know what to do.'" The crew said that they knew Christopher Lee had been in the British Royal Air Force Intelligence Service in World War Two, and they didn't really push him for more information about how he knew in such detail exactly what noise a person makes when this is done to them.