Now that we're already discussing Iron Man 3, and filming may soon start on the Superman Returns sequel, it's a good time to look at science fiction's wreckage-strewn history of bad and weird sequels. From the crazy dancing in The Matrix: Reloaded to the crazy dancing in Spider-Man 3, few genres have created as many horrific sequels as science fiction. But which SF movie sequel is the absolute worst? Only you can decide.

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