This film is the 47th entry in the category World Cinema Classics.
[Youtube=http://www.youtube.com/watch?v=n9cbKYGvfmo&feature]
La cabina (1972) by Antonio Mercero
A remarkable score which reminds of Bernard Herrmann ‘s screeching violins in Psycho (of course, it may as well be Herrmann’s original Psycho score set to a “La Cabina” slide show1). Very accomplished trailer. This film generally cited as an example of Surrealism and cinema.
Tip of the hat to the apparently defunct site Wayney of Chaotic Cinema, skeleton preserved at my wiki.
Update: 1. Yup, that’s what it was Youtube