A113 is featured in 'Deacon Stan, Jesus Man' on Chuck White's car number plate, referencing that a CalArts alumnus was involved in the animation. A113 most known for appearing in Pixar movies as an Easter egg.
The sign in front of the Episcopalian church reads "Restrooms for Christians Only". This is a nod to the fact that anyone, even a non-Christian, can participate in communion in an Episcopalian church
Stan's quote "It's a bizarre situation. Not 8 Simple Rules, let's-keep-it-going-after-the-father-died bizarre, but close." is a reference to the show 8 Simple Rules, which the ABC network decided to keep going, despite the death of John Ritter who played the titular father under the original title of 8 Simple Rules for Dating My Teenage Daughter.
When Roger is "milked" by the machine he moans "Kill Me" which is a reference to the 1986 film Aliens when the marines find a colonist who begs to be killed.