Yup, it's another sequel with a "D" stuck on the end. It's getting to where Hollywood will greenlight any film so long as it's the third one and they can make it in 3D. (So where's Gremlins 3D, geniuses?) At least gore-loving director Alexandre Aja (Haute Tension, The Hills Have Eyes) has the good sense to camp this one up a bit. Richard Dreyfus, Ving Rhams, Elizabeth Shue, Jerry O'Connell and Christopher Lloyd are among the adults trying to save hard-partying college kids (like porn star Riley Steele) from becoming fish food at Lake Havasu, Arizona.88 minutes R.