If you haven't seen The Room (famously the worst movie ever made) you must check it out here: https://www.youtube.com/watch?v=hhrNWiWp1ck
It became a cult classic after this Tommy Wiseau dude made it utterly terrible and spent millions making it and promoting it. He paid $5000 a week to have a billboard for this movie up in LA and he kept it there for 3 years.
James Franco is now doing a move based on The Room with his brother and Seth Rogan in it. It looks fucking amazing:
http://www.imdb.com/title/tt3521126/