This is a fun documentary about what many consider the worst film ever made, "Troll 2." If you haven't seen it, I can assure you it is indeed a very bad film. The documentary follows the various people that were involved in the film as the film itself gains ground as a cult film.
My favorite is one actor who is a successful dentist. He's sort of a crazy fella who at first enjoys his new found status. He goes from showing to showing at first basking and drinking up all the attention. However, he finds there are only so many times you can shout, "YOU DON'T PISS ON HOSPITALITY!" and get something from it.
Most of the cast knew they were in a strange dog to begin with but the Italian director, shooting in Salt Lake City, didn't seem to think there was anything wrong with his film. To this day, you can see it rankles him that this is considered a complete and utter dog of a film.
Best Worst Movie is a fascinating glimpse of both the process of filmmaking gone horribly wrong, and of fandom. It is certainly worth a watch.