Peter Jackson basically sucks as a screenwriter.
In The Lord of the Rings: The Two Towers, he wanted to insert a segment in which Faramir dreams that Frodo is consumed by the ring. In this future, a tormented Frodo rules Middle-Earth, which he's already laid waste to.
This is the make-up designed for that scene. They actually filmed it, but Jackson changed his mind later and never inserted it into the film.