For a bit of Halloween fun, one of my favourite poems, Edgar Allen Poe's The Raven.
As much as I like the Simpson's version, they leave out a few stanzas, including the operative one. You can read the full version here, or search YouTube for the recording-only version read by the incomparable James Earl Jones. If you like Poe's poetry as much as I do, or think you might, read another of his popular gothic poems, Annabelle Lee.
Or, if you like zombies and/or sciency stuff, check out the science behind the zombie legend.