Riffing around the theme of The Ring - haunted videotape kills people within seven days of viewing - the script also has a pop at Eminem's 8 Mile, The Matrix, Signs and The Sixth Sense, without really going for the jugular through satire or causing big laughs. More often than not - and this is spectacularly true of the Eminem rapping battle scenes - they are simply pale imitations of the originals. Rubbish imitations are not parodies, they're bloodless pastiches.