While "Avatar" was being made, James Cameron would keep a nail gun on set to nail phones that rang to the wall. Though he originally wanted the film to be released in 1999, the projected $400 million special effects budget kept studios wary of funding.
In the movie, Na'vi have four fingers and no eyebrows, while Avatars have eyebrows and five fingers. It was created with 40 percent live action and 60 percent CGI, utilizing motion capture technology. To prepare actors for the film, James Cameron took them to Hawaii and had them hunt, fish, hike, build campfires and generally live like tribespeople.