Throughout the film, Jerry (Brad Pitt) (and others) is seen to carry his handgun inside the front of the waistband but without a holster. Appropriate to the movie, this is known as "Mexican carry".
Because of the unusual nature of the script, Gore Verbinski was able to attract Julia Roberts and Brad Pitt to the project for the bargain basement amount of $15 million.
James Gandolfini reportedly lost 35 pounds for his role, all of which he had to gain back before shooting re-commenced on the upcoming season of The Sopranos (1999) because producer David Chase believed that "The Sopranos" audience would not like a "skinny" Tony (Soprano).