“Slaughterhouse 2: Death Metal” (*1/2 out of four) was a tacky and tardy sequel to the 1987 horror thriller that I don’t think anyone including the filmmakers remember besides me; this time around, the retard hillbilly brother (Bryan Butler) of the original murderer attempts to start a new life but this is disrupted by visitors (Mary Grondona, Nubia Garcia, and others) to his farm which drive him to violent redneck murder but no one understands why. Fair enough. Nobody understands the reason for this movie’s existence either. It’s crude timewasters like these that make you regret that “The Texas Chainsaw Massacre” and “Deliverance” ever existed in the first place.