I recently published a book about movies I hated, and people have been asking me which reviews are harder to write - those about great movies, or those about terrible ones. The answer is neither. The most unreviewable movies are those belonging to the spoof genre - movies like Airplane! and The Naked Gun and all the countless spin-offs and retreads of the same basic idea... the bottom line in reviewing a movie like this is, does it work? Is it funny? Yes, it is. Not funny with the shocking impact of Airplane! which had the advantage of breaking new ground. But also not a tired wheeze like some of the lesser and later Leslie Nielsen films. To get your money's worth, you need to be familiar with the various teenage horror franchises, and if you are, Scary Movie delivers the goods.