Oh, that reminds me: I howled my way through “The Man With Two Heads.” Starring Rosie Greer, not Steve Martin. To be truly funny ... and this is what Mars Attacks fails at ... a “so bad it’s good” movie must be sincere, the kind of movie where you just know the director has convinced himself that his movie will be a major blessing to the entire Earth.
See also, “West Side Story,” “Battlefield Earth,” and “the Book of Daniel.”
(OK, that last one was a TV pilot, but was the funniest damned show I ever watched.),
The actual title was "The Thing with Two Heads" and it was awesome.
They had exactly two special effects to create the man with two heads. One was Ray Milland stood behind Rosie Greer and put his head on his shoulder while they argued. The other was Rosie Greer running around with a rubber head on his shoulder.
Great, great bad movie. And it taught us alot about racism or something.