Now imagine all of these people going off-book and improvising nearly every scene. They improvised so much, in fact, that when the movie is released on DVD there will be another version of the movie called the "Bizarro edition" that will be created out of footage that never made it into the final cut.
With a cast filled with such hilarious folk doing their improvisational thing, there's no way you'll leave this theater without having laughed your ass off. I know I did. Take this, for example: