Behind You has elements of The Exorcist, Child's Play, Signs, and even Beetlejuice, but it's also, to my knowledge, the first horror film in which an evil spirit is held off with peanut butter, and that, for better or worse, is something you don't see every day. Olivia (Addy Miller) and Claire (Elizabeth Birkner) are two young sisters whose mother has just died in an unspecified accident, and wver mais...