“Tucker & Dale vs. Evil” is a hilariously gory, good-spirited horror comedy, doing for killer rednecks what “Shaun of the Dead” did for zombies. Tucker and Dale are two best friends on vacation at their dilapidated mountain house, who are mistaken for murderous backwoods hillbillies by a group of obnoxious, preppy college kids. When one of the students gets separated from her friends, the boys try to lend a hand, but as the misunderstanding grows, so does the body count. (Dir. Eli Craig)