text_a: 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 .
text_b: by presenting an impossible romance in an impossible world , pumpkin dares us to say why either is impossible -- which forces us to confront what 's possible and what we might do to make it so .