So I'm sitting there, looking in disbelief at the ending of "Forces of Nature,'' and asking myself if this is how the movie ends, then what was it about? We spend two endless hours slogging through a series of natural and man-made disasters with Sandra Bullock and Ben Affleck, and then . that's it? Bronwen Hughes' "Forces of Nature'' is a romantic shaggy dog story, a movie that leads us down the garden path of romance, only to abandon us by the compost heap of uplifting endings. And it's not even clever enough to give us the right happy ending. It gives us the wrong happy ending.