Cave troll was great too, as was the Balrog (even though I wasn't too impressed the 1st time I saw it,).
One of the most awe-inspiring moments for me was when the camera swoops around Saruman standing on Orthanc as he calls a storm to form over the mountains. The huge sky filled with broiling clouds....incredible...my jaw hit the floor like a 20lb weight.
I think the Frodo leaping scene was a small double... not sure... gee, will have to watch it again to be sure!
That's interesting... What failed to impress you about the Balrog the first time around? - I thought he was fantastic! - Great huge fiery demon (wing wings!) I felt the heat and fire when he roared. He was exactly what I pictured in my head. What was your vision of him before the movie?