What is your favorite "bad movie"?

After writing my critique of the gawd-awful Dead Easy, I started thinking about bad movies. Not bad movies you walk out of searching for the young punk who sold you your ticket with ambitions to demand your money back (which I have only done once ... unsuccessfully), but bad movies that are so bad they rock.
For me, my favorite “bad movie” is the 1985 cult classic, The Toxic Avenger.
Directed by Lloyd Kaufman (under the alias Sam Weil), president of Troma Studios, the film centers on a geeky health club janitor, Melvin, who falls into a barrel of toxic waste and mutates into a superhuman crime-fighter.
On the basic principles of filmmaking, Toxic Avenger shouldn’t work as well as it does. Stuntmen and their safety equipment can be seen in almost every stunt, the special effects are low, low-budget, the acting is over-the-top and it’s so gory the film had to be severely cut to receive an ‘R’ rating.
Still this film works on every level. You actually identify with the rags-to-mutant Toxie, and after that — once you’ve suspended your disbelief (or locked it in the dark root cellar of your mind) — everything becomes believable.
It’s B-movie magic, and even after 20 years it is still one of my favorite films.
I’ve had the pleasure of interviewing Lloyd Kaufman on three occasions, once in the New York offices of Troma Studios, and I remember him saying the allure of The Toxic Avenger is the story. People will overlook bad acting, bad effects, bad stunts, everything if the story is good.
He proved it again in 1996’s amazing Tromeo and Juliet, a B-movie version of the William Shakespeare classic — with all the gore and rock ‘n’ roll missing from the original tale. Again, one of my favorites (not just because it stars Jane Jensen - a truly super sonic cheeka!).
The Toxic Avenger spawned three sequels (the latest, Citizen Toxie, was released in 2000), a cartoon series, a comic book and a musical, and Toxie is the very symbol of Troma - the longest running independent film studio. Troma is currently working on Poultrygiest: Night of the Chicken Dead, which will be released in December. I for one am looking forward to seeing that.

So, what’s your favorite “bad” movie? Tell me in the comment section.