DunxDunx (aka Slam Dunx) is Mark's old friend and fledgling filmmaker.  He is enlisted by Mark to make a video about his porn addiction in the hopes that it will gain him leniency from the Judge in his upcoming trial for public indecency.  But Dunx sees Mark's dilemma as an opportunity to finally make a movie, so he maxes out his credit cards, throws his ethics to the wind, and does his best to make the movie that might one day get him into Sundance