When Cartman and Scott sit down to eat chili together, Butters, Kyle, Stan and Scott's friends stand behind Scott. They're all missing when Scott learns the name of Cartman's chili, and they all reappear after Cartman finishes taunting Scott.
In Cartman's first flashback, where he tells Mr. Denkins that violent pony killers were in the area, the silo next to the barn is missing.
When Cartman is eating his chili, he almost empties the bowl before he stops to talk, then the shot goes to Scott then back to Cartman and now the bowl is almost full again with a little chili sticking up above the brim.
In the beginning of the episode Kyle says Scott Tenorman is a ninth grader. However, when Clyde asks who Scott is at Cartman's meeting, Kyle
explains that he's an eight grader.
In the opening Cartman rides up in his tricycle and parks it alongside the road. He gets off and brags about pubes and suddenly, while not touching the trike, the trike moves from the road to the snow-covered ground and is facing forward.
Kyle says Scott Tenorman is a 9th grader in the opening, but at Cartman's meeting he says Tenorman is an 8th grader.
When Radiohead is at the recording studio, Colin Greenwood is holding an acoustic guitar, and Ed O'Brien is not holding an instrument. Colin is the bassist in Radiohead, while Ed is the guitarist, effects artist and backing vocalist. Ed should be holding the acoustic guitar while Colin should be holding a bass.