Trivia: Orson Welles' line "...you know what the fellow said... In Italy for thirty years under the Borgias they had warfare, terror, murder, bloodshed - but they produced Michelangelo, Leonardo da Vinci, and the Renaissance. In Switzerland they had brotherly love, five hundred years of democracy and peace, and what did that produce? The cuckoo clock." was not in the script. Welles just wanted to say it, so he did, much to the anger of the original author. He thought it was a terrible piece of writing but it has turned out to be the most memorable line in the entire film.
Trivia: The strange incantation heard at the beginning of the orgy scene is a fragment of a Romanian Orthodox Church sermon played backwards. If you play it backwards you'll notice that there are two main voices (in the movie is supposed to be only one - the voice of the "great priest") and a choir.
Trivia: After Frankie tears up the apartment, possessed by the priest, she goes to the bed and levitates in a cruciform position. During this scene, there is a quick, sweeping shot of the wall and, if you watch it in slow motion, you can see a wall of boxes of Ritz crackers. This is either an obvious endorsement or some kind of inside joke.
Trivia: The faun is not actually Pan. The film's correct title translated into English is 'The Labyrinth of the Faun'. However, the director, Guillermo del Toro, thought that the English-speaking audiences would get confused between a 'faun' (mythological creature) and a 'fawn' (baby deer). Therefore, for all English-speaking countries, the title is 'Pan's Labyrinth'.
Trivia: When Arnie and Leigh discover that the car has been trashed at Darnell's Garage and Arnie suddenly turns on Leigh, yelling at her and shoving her backwards, note the look of shock on her face - it's real. Keith Gordon (Arnie) explains on the DVD that in rehearsing the scene, he purposely didn't react as violently, so when the scene was shot, his behavior change actually shocked Alexandra Paul (Leigh). (00:57:20)Jeff Swanson