text_a: the acting is stiff , the story lacks all trace of wit , the sets look like they were borrowed from gilligan 's island -- and the cgi scooby might well be the worst special-effects creation of the year .
text_b: proof that a thriller can be sleekly shot , expertly cast , paced with crisp professionalism ... and still be a letdown if its twists and turns hold no more surprise than yesterday 's weather report .