When the MPAA slapped Zack and Miri Make a Porno with an NC-17, it was largely due to one scene, which Kevin Smith affectionately refers to as "The Offensive Bodily Fluids Shot." To talk the MPAA down from an NC-17 to an R, Smith told us he made a clip-reel of similar offensive-fluids shots in other R-rated films, including the dog feces scene from American Pie 3 and the fart-helmet stunts from Jackass 2. Smith won, and now you can see his "Offensive Bodily Fluids Shot" in theaters. But what did the critics think?