- Wrote the preface for Lloyd Kaufman's "Make Your Own Damn Movie"
- After South Park (1997)'s success he was asked to make a new show, so he did two episodes of Princess with Matt Stone, which was canceled because of its strong sexual content. It was soon released on the Internet.
- (2011) Co-director with Casey Nicholaw of the Tony Award-nominated musical "The Book of Mormon," for which he also wrote the book and composed the score in collaboration with Matt Stone.
- Once made live action, fake interview as GI Joe arch enemy Cobra Commander.
- (2010) Audio commentary with Matt Stone on U.S. DVD release of Look Around You (2002) season 1, episodes Water (2002) and Germs (2002).