In Don Jon, writer-director-star Joseph Gordon-Levitt has to make a choice between a relationship with Scarlett Johansson or giving up Internet porn. An impossible choice! One of the funniest movies I've seen in a long time.
According to the guy who does movie reviews on our local radio station, the screening he went to saw people realizing 20 minutes in how bad it was, and went MST3K on it. Yelling jokes, booing lines, and basically pissing all over it.