This film did more for a return to monogomy than any social diseases! I've just re-watched this flick, and it's just as effective as when I first viewed it. Picture a younger Baby Jane Hudson combined with Jaws, and that's pretty much "Alex", Glenn Closes' woman scorned. Michael Douglas, as the typical, successful, arrogant, mid-'80's Yuppie, who, though perfectly nested in a seemingly great marriage to gorgeous, giving, Anne Archer, has to prove he's still a desirable stud by having a "casual" (WRONG!!) fling with Closes' "Alex", a sexy, also seemingly sophisticated associate of his. She initially gives the impression she wants the same thing as he, a "no strings attached" sex-fest, but, after a 24 hour marathon, while wifey is out of town, it begins to become apparent that Alex is becoming just a teensy bit possessive, and when Douglas, as diplomatically as possible, tries to explain to her that he's happily married, and it's dumpster time, Miss Alex IS NOT buying it. The ensuing harassment of he and his family, which starts with pranks from Alex to express her displeasure, turns into a horror-ride that will have your emotions tap dancing faster than Ann Miller!! Some people feel the need to rationalize the entirety of a film, "why'd she do that", that wouldn't happen", etc... not me. With a film like this, it either entertained me, or didn't. Well, this one certainly did. I found all the acting excellant, and the situation not all that unbelievable. Though "over the top", it is a non-stop ride of suspense as Douglas' nightmare (and life) un-folds. I recall there were some copy-cat flicks made shortly after this came out, trying to duplicate what this film has. Well, they didn't succeed, and were soon forgotten. I feel that this film, with its great cast , production, intelligent script, and direction, will not be topped for films of it's kind, and will stand the test of time. It pushes ALL the buttons.