Wolf Creek, an unusually crisp and boldly shot Texas Chainsaw Massacre knockoff, looks as ancient and patterned as a druidic ritual. A bunch of kids jump into a car and head for a famed crater in the middle of the outback, only to get stalled by engine trouble. Their savior? A jaunty hunter (John Jarratt) who drives up in his truck, offering assistance with just enough of a derisive cackle to make him seem like ''Crocodile'' Dundee with a loose screw. What follows is some very well-staged kidnapping and torture and escape that still manages to come off like a rerun of last month's Chainsaw retread.