Although Scary Movie 2 was downright scream-worthy, director David Zucker (the mastermind behind Airplane!) takes the controls to push this one to new heights. Of course, SM3 is still based on lowbrow humor (think poop jokes and tacky sight gags), but it gets a laugh or two. There's some loose plot about aliens invading Earth, and spoofs of The Ring and Signs have something to do with it.
But all you've got to know is that Leslie Nielsen helps save the day, there are people running around in cheap alien costumes, and the story even makes Simon Rex seem funny. Now, that's frightening!