We learn in this episode that Cow and Chicken's favorite dinner is Pork Butts and Taters.
In "Field Trip to Folsom Prison", Mom's shoes are black, but in every other episode, they are red.
(Chicken sticks his head out the window)
Cow: (gasps) That is a good way to lose a beak!
Chicken: Ah, shut your pie-hole! (gets hit with sign)
The yellow spots on the teacher's dress are actually holes.
Flem and Earl are based on the creator's friends back in Middle School.
Red Guy is actually based on a guy who always dresses in red that the creator knew in real life.
This is the first appearance of Mom, Dad, Flem, Earl, and Teacher.
In these earlier episodes, Cow has more a country accent. This is due to a different direction, where the directors and writers asked the voice actors to have this accent.
Red Guy's Role: The Warden
This gives a clue that Cow and Chicken live in California, if they fieldtrip to Folsom.
Chicken: I gotta be home by 8:00, or I'm in big trouble! Anyhow, Mom is makin' Pork Butts and Taters. She only makes it on Tuesdays, it's my favorite!--------
This is a small reference to the show's original timeslot: Tuesdays at 8:00 PM.