 SPOILER: The Mexican brothel scene when Longbaugh  (Benicio Del Toro (qv)) slaps one whore on her behind as she is  running out, was unscripted. Christopher McQuarrie (qv) privately  suggested it to Del Toro who was very resistant to it. The extra  playing the whore was not told about this. As Del Toro feared, she  came back after the shot was filmed very angry and complained how  she was slapped. Del Toro immediately turned to McQuarrie and said  "he made me do it!!!". (From the directors commentary on the DVD)