Mike (and Kevin, and whoever else), do you feel that there is any particular genre of movie that is inherently not feasible to riff on? For instance, I like to heckle movies as a hobby and I've considered rock operas such as the terror-man-was-not-meant-to-know that is Sgt. Pepper's Lonely Hearts Club Band. I'm not really sure how possible it is, from a technical standpoint, to heckle a movie where the dialogue is entirely sung. Do you think such a movie can be successfully riffed, or would the attempt just turn into a giant pile of flaming wreckage akin to your average rock opera?