This page contains trivia for "Casa Bonita". Remember, trivia must be factual, provable, and it is always best to cite your source for not-so-obvious trivia. If you would like to dispute a trivia point, please discuss it in the article comments.
Trey Parker mentioned in the DVD commentaries that this was one of his all-time favorite episodes.
Eric Stough, director of animation and producer, was credited as "Eric Leopold Stotch", referring to how Butters is based on Eric Stough.
The result of Cartman's calculations of how long it would take the meteor to collide with Earth is roughly 5.501408748 (assuming 10¹ is in base 10 and then converted into base 9).
References to Popular Culture
Casa Bonita is a real world restaurant in Denver, Colorado. Unusually, the restaurant allowed their unaltered name to be used on South Park.
Parts of this episode may parody the Fallout video game series (which in turn takes several references from the film "A Boy and His Dog"), such as the post-apocalyptic world Butters thought he awoke to and the dog he befriends, a possible reference to Dogmeat.
Butters makes reference to this episode later in "AWESOM-O".
Cartman is finally invited to Casa Bonita, along with all of his classmates, in the later episode "You Have 0 Friends".
Cartman says to Butters that a cannibal bit off his hand, but later, when Butters can see, he doesn't realize that Cartman's hand is supposed to be missing.
When Kyle explains, why he takes Butters instead of Cartman he says " I'm gonna take Butters. He invited me to his birthday party last month, so I owe him one." but Butter's birthday is on September 11th and Kyle's on May 26th which means there are more than 7 months between their birthdays, not one.