In the scene when Nick spits soda on Kim, she kicks the paper glass. It falls to the ground, but in the next shot it is back on the bench.
When Sam talks to Cindy in the cafeteria her hair suddenly moves from her back to in front of her shoulders and then back again.
After Kim kicks over the soda and leaves, Lindsay's hand is on her mouth, but when the camera changes angles, it's down on her knee.
In the scene where Neil, Bill and Sam are eating in the cafeteria, Neil asks if "anyone saw Dukes of Hazzard last night?" Dukes of Hazzard aired on Friday nights, so the next day would be Saturday and there would be no school.
Daniel wears a shirt with the cover art for Black Flag's "Jealous Again" EP throughout. The record was released in November of 1980, the same time this episode takes place. It is highly doubtful that his character would be aware of Black Flag, given the music the characters listen to, much less have a Black Flag shirt.