And it took nine weeks of wet, night filming to shoot the scene.
Orlando, who plays Legolas, told the website: "It was physically very demanding. We were filming it on a quarry, so just the uneven ground was a challenge and it was night."
The Two Towers continues the story of Frodo Baggins and the Fellowship's treacherous journey to destroy the Ring.
The much-anticipated film comes out 18 December.