Continuity mistake: When Eric comes running over to talk to the other 3 boys about the handicapped competition, their toy trucks are quite far apart from each other, but when it cuts from Cartman and then back to the boys, Kyle's truck has moved all the way in front of Stan's truck.
Continuity mistake: In the scene where Jimmy and Timmy are training, you can see that there are two people behind them, a girl wearing a pink top with a flower on and a boy with some green glasses on. When it cuts to Jimmy and Timmy talking, and then goes back, the boy wearing the glasses has disappeared, then a few shots later the boy with glasses is back.
Continuity mistake: When Cartman is planning out how he's going to be retarded, in the shot from behind him when he's on the computer there is a cup with a red and yellow pencil in it, the red is on the right and the yellow is on the left. Yet when it goes to looking at Cartman from the other way the crayons must've swapped positions because now they are the other way around.
Continuity mistake: Just after Stan returns to the forest and sees that the antichrist is born, the squirrel mentions that the antichrist will bring a thousand years of darkness. At the same moment you can see standing next to him the rabbit. Despite the fact that he was sacrificed earlier in the episode and is not seen in any of the shots before or after this.
Audio problem: After Stan does the line dance while the other team announces that "its on", and the bystanders are watching. As the blonde haired white guy says "Oh Lord its on." The Asian kid from the group is saying the exact same thing. However you don't hear his voice.
Continuity mistake: When Butters is in the hospital, you see blood start coming down his cheek, but when the shot changes from a top view to a view from his feet, there is no blood running down his cheek, which should've started showing in the shot already.
Continuity mistake: When the handicapped people are on the bus, from a distance you can see that on the far window there is a kid nodding his head from back to front with black hair and when it goes into the bus you can see that the kid has brown hair and is nodding his head side-to-side.
Continuity mistake: In the town hall meeting scene, a man says that he is "shocked and appalled" by what has happened. In the wide shot, he is sitting next to Liane Cartman. In the closeup, Liane is replaced by a woman dressed in purple. In the next wide shot, Liane is back.
Revealing mistake: When the "Asian Kid" is first introduced on the Dance Dance Revolution machine, the arrows are going up the left side (Player 1 side) of the screen, but he is obviously playing on player 2's side. To make matters even worse, the dance pattern on screen doesn't match the way he's dancing, yet the screen also shows that he's doing pretty well.
Continuity mistake: When Kyle slides a $10 bill into the ticket booth, the $10 bill is shown lying left to right. After a couple of cuts to where the ticket taker is saying "But this is such an important film..." the $10 bill has changed positions.