I don't personally own any part of this scene, nor would I normally say that this part of the movie happened. But I thought it would make a good little story. This is what I believe went through Haldir's mind when he died. Also, this is a revision of the original. I watched the movie again (had a good cry, too), and now it fits exactly with what happens in that scene. Curse you, Peter Jackson, for killing him!
The battle rages around me, the exhilaration of destroying all the orcs I possibly could fuels me. But it is not enough, and the outlook is grim for all fighting; all but the Enemy. They had broken through the wall, and were well on their way to breaking down the gate. They would get through, and then there would be more suffering. But I would do all I could to prevent it; we would honor the alliance to the death, if that was what was required of us.
"Nan Barad! Nan Barad! Haldir, nan Barad!" I hear Aragorn shout over the cries of battle. To the Keep. I nod, calling the elves to me, noting with a slight bit of amusement that the dwarf was being dragged from the battle; he had not changed from the stubborn creature we had found in the Wood. But my soldiers do not come quickly enough, and I call for them again; the Keep must be held, or many mortal men would die.
As I kill an orc, one next to me turns and the sword pushes itself through my chest. As I stumble, my sword finds its mark, but there is another behind me and I feel cold metal in my back; there is more pain, pain unimaginable. Faintly I hear Aragorn calling my name as I fall to my knees, the pain replacing every other sensation in my body. I turn my gaze to him, watching him fighting his way to me. But what does it matter? The wound is fatal; I am fading... and I find that I care less and less with each passing second. The world begins growing dim, and I feel the Halls of Mandos beginning to call; I look around at the still forms of my fallen comrades, their bodies laying beside both fallen orcs and men; and though I do not fear death, I fear for what will happen to those who remain. I try to hold on to life, to stay and fight a little longer, but the cold creeping up around me is too strong.
I fall backwards, finally giving up my fight. Others would continue, and triumph where I had failed. As Aragorn catches me, I begin to notice that I can not feel anything; not the pain, or the feel of his arms holding me up. Aragorn places his hand on my chest for a moment in a gesture of farewell; he lays my body down and fights once more with renewed fervor. I watch for a moment, but I feel the Undying Shores calling to me, and I turn from this world for the next.
I can hear music...