He who said that third times are a charm sure said a mouthful. That, at least, would excuse the reason why I found myself completely enthralled by "Jurassic Park III," the latest installment in an obligatory franchise about genetically engineered prehistoric giants. Much less science-driven narrative and more of a brainless action adventure than either of its two predecessors, the film has classic symptoms of B-movie status, something that, frankly, the series could have used from the very beginning. Though the original endeavors--both "Jurassic Park" and "The Lost World"--effectively used special effects to generate creatures that had died out millions of years before man, the writers failed to realize the full potential of their stories, thus ending up in mediocre payoffs. Here, they've finally gotten things right--the dinosaurs are as realistic as ever, the characters are intelligent, and the story is such nonstop silly entertainment that, by the end, the only complaint we have is that it all ends too soon.