“Johnny Gruesome” (*1/2 out of four) was a muddled teen horror mess about a rebellious high-schooler (Anthony De La Torre) who is murdered but returns from the grave to wreak havoc and seek vengeance on his murderers and still finish out the fun times he wasn’t able to complete in high school. Attempts to mix a horror movie with a John Hughes-like teen melodrama simply doesn’t have the conviction or intelligence to work and wears out after a while. Director/writer Gregory Lamberson adapted his own award-winning novel but viewers may be better off watching Mickey Rourke’s “Johnny Handsome” instead.