Re: Movies
I don't think there was an alternate ending, but the stories go that the original cut was gruesome enough that it would have gotten an NC17 rating from the MPAA, so the producers had the violence cut down quite significantly. Then that trimmed cut was shown to test audiences, who thought it was still too gruesome and also too long, so scenes of plotting and character development were cut down as well. In total I think some 20 odd minutes were removed in total.
Worst movie I've ever seen is Night of Horror, from 1981 or thereabouts (some sources say it was made in '78). I'm the kind of guy who often really likes films that other people say are the worst ever, I'm a big fan of Manos: The Hands of Fate for example. But Night of Horror is neither strange, hypnotic nor amusing in its badness, just unbearably dull. The highlights are a plastic prop skull, a stretch of Civil War re-enactment footage and a smudge on the camera lens. There are films I've disliked more, but Night of Horror is easily the worst I've seen, and I'd say is a candidate for the worst ever made.