 SPOILER: For the scene in which Annie is killed,  Suzanne Pleshette (qv) who played her told Hitchcock it would look  good if her ear was all bloody and hanging off, so he sent her to  the prop department. When it came to shooting the scene, Hitchcock  had Annie facing the other way, so the viewer never sees the ear,  which Pleshette recalled "was part of his delicious sense of humor."