Continuity mistake: In the cinema hall, when we see the South Park kids before the movie starts, you can see what looks like a baby, who we can presume is Kyle's baby brother, sitting next to him to his right. However, at the part in 'Asses Of Fire' where Terrence and Philip are having a farting competition with a traffic police and after a couple left the cinema in disgust, the camera cuts back to the gang but the baby has disappeared. After the gang leaves the cinema 3 hours later, the baby reappears and is seen dangling on Kyle's arm. (00:04:50)