I remember seeing commercials for it. I didn't remember the name of the film, but the concept of writing a story that turns the readers insane intrigued me. I've been meaning to steal that idea since I saw the commercial.
I saw Run Lola Run (foreign) before this film, and it had made me think about narration and the author's involvement in the story, so this film (coincidentally) kept to that theme.
This the one with Sam Neill? Saw this years ago when I was in high school. Takes a few viewings before it's fully appreciated, but it's surprisingly decent.
Diogenes of Sinope: "It is not that I am mad, it is only that my head is different from yours."
Arnold Judas Rimmer, BSC, SSC: "Better dead than smeg."