When the producers tried to buy the rights of Frank Zappa's "Watermelon in Easter Hay" they were told by Zappa's family that Zappa requested that three of his songs were never played in any media except the album where they appear and that song was one of them. Gail Zappa, Frank's widow, saw the movie when editing was almost completed and agreed to make an exception because she considered that Zappa would be proud of the movie.
The translation of the tagline is: "Life has its way of teaching us. Life has its way of confusing us. Life has its way of changing us. Life has its way of astonishing us. Life has its way of hurting us. Life has its way of curing us. Life has its way of inspiring us."
The last names of all the principal characters (Zapata, Iturbide, Carranza, etc.) are those of important figures in Mexican history. The last name of the one Spanish character - Cortés - is that of the Spanish conquistador who conquered much of Mexico for Spain.
In the scene where Louisa wakes up in the car at the beach, in the shot inside the car, her jeans are torn at the left knee. Subsequent shots show an un-torn pair of jeans.
The image of Ernesto 'Che' Guevara hanging from the rear-view mirror keeps appearing and disappearing during the first part of the road trip, right before it is substituted by the toy rabbit Luisa buys at the township.
The movie takes place in the summertime - we know this from the boys just having graduated, their girls going off to Europe, the weather, etc. Yet at the wedding near the beginning of the film, the narrator tells us that in a few days the president of Mexico will go to Seattle for the WTO conference - which happened in November.
What are the differences between the R-Rated and Unrated (NC-17) Version?
A
Several scenes containing nudity and explicit sex have been removed for the R-Rated Version. Furthermore for the R-rating the subtitles had to be adjusted. Words like "fuck" "suck my dick" or "pussy" were replaced with tamer ones, such as "have sex" or "sweet little thing". Altogether more than five minutes of footage are missing in the R-Rated Version and a detailed comparison between both versions can be found here.