[Trey Parker and Matt Stone]called me one Saturday morning and said, "Can you do an impression of Conan O'Brien?" And I said, "I don't know." Because that was really... He hadn't been on the air that long, and to be honest, I hadn't watched much of him at that point. So I went to Santa Monica to their studio and said, "Well, what does he sound like?" They said, "Well, just try it one time. Read the copy." And I read the copy one time, and they went, "Okay, that's fine. Thanks a lot, that'll do. That's perfect."