Jack Hill's Spider Baby (1964) is a genuinely creepy romp through the finals days of the Merrye family, complete with cannibalism and homicidal jailbait. The plot is fairly straightforward: family chauffeur Bruno (Lon Chaney, Jr. in one of his last and best roles) has taken on the guardianship of a trio of deranged "children". He tries to protect his wards from their own psychotic tendencies, and from the grasping relatives who try to make a profit from the children's tragic dementia, but ultimately it proves too much for him. It's a wickedly delightful film, full of surprises.