Imagine that the camera is possessed with a psychosis similar to human schizophrenia; suppose that this disease subtly changes every single frame while leaving the narrative superficially intact. Then imagine that these symptoms came on as a result of the trauma of recording bizarre or horrific events, for instance those of the 1941 horror film Dr Jekyll and Mr Hyde. Scenes from the Victor Fleming movie are restaged frame by frame with new performers occupying the body spaces of Spencer Tracy, Ingrid Bergman, etc..