Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you've got half a brain, you won't last 15 minutes

Fair warning - I won't tell the joke, but I definitely will give away the premise of this movie. The joke that this movie is based upon is simple, straightforward, and dates from the days of vaudeville. In it's simplest form, it is a quick set-up, punch line, and rim-shot. The point of this documentary is that each comedian that has told it over the years has improvised their own details in the middle, and seem to have an ongoing contest to see who can make it the longest and the most disgusting. If you find bodily fluids, unnatural acts, and cursing as funny as you did when you were an adolescent, then you might actually like this movie. Otherwise, it's a huge waste of time.