The production was famously physically demanding for the cast:
Lord of the Rings: The Two Towers movie review - Roger Ebert
: The actor broke two toes while kicking an Uruk-hai helmet; the take featuring his genuine scream of pain is the one used in the final film. He also purchased the horse he rode, Brego, after developing a close bond with the animal.
: Andy Serkis's performance was originally meant only for voice-over, but his physical audition convinced Jackson to use Motion Capture technology for the entire character. A specialized "sub-surface scattering" software was developed to give his digital skin a realistic translucent glow.
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: It is frequently cited as one of the greatest sequels in cinema history, with the 45-minute Battle of Helm's Deep hailed as a masterpiece of combat cinematography. Available Media & Guides
: For the 10,000-strong Uruk-hai army at Helm's Deep, Jackson recorded 25,000 cricket fans at a stadium chanting in Black Speech.
: Brad Dourif (Gríma Wormtongue) had to shave his eyebrows off five times over three years due to repeated filming recalls.