Return of the King.
During Faramir's charge across the Pelenor Fields. It wasn't really the same crying, but tears came to my eyes. Such a waste, worthless and pointless. :blush:
Something akin to horror that it could happen, I suppose.
Though on a side note, after the first time I heard Theoden's speech when they arrived at Minas Tirith to relieve the garrison, I woulda fought for him. ^_^