Most filmmakers don't set out to make terrible movies, but it still happens more often than most folks would prefer. (Unless you're one of those people who loves watching schlock in an ironic way. In which case...boy do I have a list for you!)
There's no one specific reason that a movie turns out terribly. Miscast actors, lazy directors, a rushed production schedule, or a poorly-written screenplay can all contribute to the derailing of a film before it ever gets into the editing room. Or sometimes - as is the case with many of the films listed here - it's a perfect storm of all those things and more.
But even the worst movies occasionally show flashes of potential. These are professional filmmakers behind the camera, after all. There can still be moments of genius buried under the rubble of bewilderingly bad movies. Finding them, though, is often an exercise in sadomasochism.
These scenes are so magnificent that they almost redeem the piles of hot garbage surrounding them. Like a neglected child, we just wish they could be picked up and transplanted into a better home.