BLOODY TOURISTS

Nightbeast, d. Don Dohler (1982)

This movie doesn't mess about. A monstrous alien lump, with a mouth full of terrible dentistry, crash lands on Earth near a small mid-western town and spends the rest of the film killing everybody he meets. This is, apparently, a close encounter of the sixth kind*. At first he uses his disintegrator gun which looks brilliant and is astonishingly effective. Later on, it uses its bare hands, clawing and clutching and chopping his victims into bloody bits and pieces, memorably popping the idiotic Mayor's head like a pimple. 

Clearly a creature made of a form of flesh and some sort of bone, it's never quite explained why it isn't in any way affected by the five hundred or so bullets he has fired into him, but regardless of the science, it makes for a formidable threat who, like Odd Job, Ted Bundy or Jaws 2, can only be destroyed by the application of an enormous amount of electricity.

* i.e. death or injury is involved. A close encounter of the seventh kind involves interplanetary sex.