Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Audio problem: After the first group of people run to buy an orange smoothie, when the security guard says, "Jesus, they're gonna start a riot," his mouth never lip-syncs the word "riot." (00:08:28)






Answer: He appears in at least 5 other episodes, but usually just as a background character. He can be seen at Cartman's party in "Immaginationland". He was also one of the kids trying out to replace Butters in the "Professor Chaos" episode.
Bishop73