"Manos" The Hands of Fate, a film that would come to be the yardstick by which all bad movies are measured.
If you don't have time to read the in-depth account, here's the short version: Sometime in the mid 1960's, Hal Warren met Stirling Silliphant, who was visiting El Paso to scout out film locations (Silliphant would later go on to write screenplays for real films like In the Heat of the Night and The Towering Inferno, and not-so-real films like The Swarm). After several conversations with Silliphant, Hal Warren somehow got it into his head that he could make a movie just as well as anybody in Hollywood. After pounding out a script (tentatively called The Lodge of Sins), he rounded up a few college kids to be his crew, then got some actors from the local community theater and a few models from a nearby agency to be his cast. (Say what you want about ol' Hal, but he must have been a hell of a salesman to convince so many others that he could really do this.)
Finally, he secured a camera and got down to business. The camera that Hal used, unfortunately, was a 16mm Bell & Howell model that had to be wound by hand, meaning it could only record film for roughly thirty seconds at a time. (This is the reason for most, though not all, of the choppy editing work you'll see in the film.) In addition, it couldn't record sound; Therefore, all dialogue and sound effects were dubbed in later. (It's said that nearly all of the voices you hear in this movie were provided by the same three or four people.)