One suspects the dinner table conversation about making “Family Movie” had to go a bit better for Kevin Bacon than for Jack Smith, the B-movie director he plays in this horror movie send-up. But the fear that Bacon has gathered everyone for something indulgent is quickly disabused in the silly and gory comedy where the fun all are having on screen extends to those who aren’t directly related.
Like the scrappy productions that Jack specializes in, “Family Movie” is crude in most respects, including its brusque, reckless editing to match its many brutal kills. But it’s sophisticated where it counts when it quickly moves away from easy jokes about being on the low-budget set to harder truths about being in a showbiz family that have to be confronted as a real killer runs loose on the farm. It’s instantly ingratiating to see Helen, (Kyra Sedgwick) and her…