Take a look at this trailer for RPG-themed indie comedy Zero Charisma. I say 'themed' because it looks as much about RPGs as, say, The Wrestler was actually about wrestling. Certainly looks worthwhile tracking it down though. Here's a synopsis:
Metal-loving gamer geek Scott Weidemeyer lives with his ornery grandmother and works a lousy job at a donut shop. But every Tuesday night, he is the omnipotent GM, guiding his role-players through a tabletop journey of fantasy and adventure. However, when neo-nerd hipster Miles joins his game, Scott begins to resent the admiration Miles receives from the other players. To make matters worse, the health of his grandmother begins to falter, and his estranged mother visits town, reminding Scott of a childhood he'd just as soon forget. Caught in a spiral of rage and delusion, Scott is forced to take drastic steps to reclaim his honor, and his identity as the GM.