Diego Luna explains the gestation of El Búfalo de la Noche, Mexican novelist Guillermo Arriaga's first film since his split with Alejandro González Iñárritu. Following the success of Babel, a letter addressed to Arriaga appeared in Chilango:
"It's a shame that in your unjustified obsession to claim sole responsibility for the film, you seem not to recognize that movies are an art of deep collaboration," it read, and was signed by, among others, González Iñárritu, Diego Luna's best mate Gael García Bernal and Gustavo Santaolalla.
Arriaga maintains that he is a noveslist and that screenwriting is just his day job.
The interviewer that evening in the Odeon Covent Garden looked quite keen to learn more about all his dirty stuff.