It would have been incredible if Aragorn had passionately plunged his sword into Lurtz's body after decapitating him. It would have shown that Aragorn was genuinely angry that his friend had been killed and would have added a lot of emotion to the scene. Maybe add a "I just broke my toe by kicking a prop" scream just to prove the point. Then again, since Boromir was still alive on the ground, perhaps it was best that he rushed over to be with him for his last few moments. Thoughts?