IGN has posted an extended clip from James Cameron's upcoming sci-fi epic, Avatar! You are not going to want to miss this scene that features actor Sam Worthington in the fight of his life...

In the future, Jake (Sam Worthington), a paraplegic war veteran is brought to another planet, Pandora, which is inhabited by the Na'vi, a humanoid race with their own language and culture. Those from Earth find themselves at odds with each other and the local culture.

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Avatar stars Sam Worthington, Zoe Saldana, Sigourney Weaver, Michelle Rodriguez, Giovanni Ribisi, Joel David Moore, CCH Pounder, Peter Mensah, Laz Alonso, Wes Studi, Stephen Lang and Matt Gerald. It comes to theaters December 18 from 20th Century Fox.