This page contains trivia for "How to Eat with Your Butt". 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.
This is the first episode in which Butters is grounded.
References to Popular Culture
The milk company's computer is a reference to Star Trek: The Original Series. In Star Trek, the computer works similarly, with voice commands. It is also able to calculate results based on input and relay the results with a programmed voice.
Jonesy, a member of Skyler's band in "Timmy 2000", is one of the people sitting in the movie theater watching "Grossout Comedy 8".
The Thompsons had claimed that their son's name was "Tommy," but one of the men at the reunion celebration said the boy was called "Billy."
When Ben Affleck is identified as their son, his shirt continually alternates between colors. One minute it's khaki, the next it's white, then it's khaki again.
When Cartman has his picture taken, he drops his hat. In the next scene, he takes his hat from his back pocket, not the floor.
In the last scene of this episode, Cartman is missing his double chin.
In the beginning of the episode, Butters is shown walking up to get his picture taken. In the next shot, he is shown waiting in line in front of Kyle.
The order of the kids in line to get their pictures taken changes often, and many kids disappear completely.
After the Thompsons reunite with their son, Kenny and Cartman cross the street when a motorcyclist suddenly runs Kenny over, crushing him. Cartman is amused and Stan and Kyle don't say their usual lines. Earlier in the episode, it was reported that people were getting randomly squashed by motorcycles.