It might only be the third weekend of January, but the new horror flick Mama is already in the running for worst film of the year. These type of children obsessed ghost stories (dating back to The Ring) are a dime a dozen, and they are usually awful but harmless. Mama, on the other hand, refuses to rest on its clichéd laurels, and instead defies all logic and genre conventions to deliver not one, but two, overly convoluted (and downright stupid) back-stories to explain its improbable tale. Which isn’t to say the film (if it can even be called a film) doesn’t shove every cliché down our throat from the creepy kid (times two!) to the insane-for-no-reason-other-than-the-plot-mother to the weird-noise-making-bending-backwards-ghost.