So far I've only walked out of one film, Los Paranoicos / The Paranoids. This movie was a little too self-reflexive for me with its hapless protagonist working on a script during his kooky life. After about twenty minutes I started ignoring the subtitles to see if I could keep up with the dialogue based on my knowledge of Spanish. After ten more minutes, even that bored me. I doubt much more happened in the film.