Continuity: The stars keep changing(especially the sparkly big one)position when Cartman is tied to the tree.

Continuity: Mr.Garrison's glasses change throughout shots,from a thin pair to a bold pair.

Continuity: When the boys are first seen in the cafeteria, Stan is in front of Cartman. When Kyle says, "Hey look, there's Wendy Testeburger." in the next shot, Stan is now behind Cartman.

Continuity: In the classroom there is a poster of Christopher Columbus in the back wall in the class. In the last shot of that scene you can notice that the poster has disappeared and is replaced with an astronaut poster.

Continuity: In the classroom scene where Kyle tries to be excused from class to find Ike, Cartman sets Pip on fire as he was sitting just behind him to the the left. However in the previous shots Pip had not been sitting there, some other kid was and wouldn't have had enough time between shots to move.

Continuity: After Stan vomits from Wend talking to him, the vomit disappears in a few shots.

Revealing: When Cartman finishes talking about his nightmare in the beginning, Chef comes and you can see his hat poking out of the roof of the car. They couldn't really fix this because this episode was done out of construction paper.

Audio problem: After the scene where Mr. Garrison says, "You can say that again, Mr. Hat," Kyle shouts, "Give me back my brother you stupid aliens" in Stan's voice.