The Serpent and the Rainbow is a nice change of pace from your typical zombie movies, as it discards the comet or secret army gas type source of creating the living dead, and explores the true origins of the zombie mythology within Haiti.  Based on a true story from a book of the same name (and highly fictionalized in the actual movie), it's full of some creepy funky voodoo action.  In real life, a researcher found that a poison made from a local blowfish could be used by a Voodoo Priest to bring someone to a near death state.  The funeral would be held and the subject subsequently buried.  The Priest would then bring the subject back to life, still drugged and zonked out of his mind, and the poor victim's families would soon be hit up for cash by the Priest so he could finally put the man's "undead" soul to rest.

Wes Craven adapted the book to film, and it starts with tremendous promise, but devolves into your standard cookie cutter kill the unstoppable bad guy flick at the end.  Regardless, the movie has one of my personal favorite scary scenes.

Bil Pullman plays a scientist named Dennis Alan who gets in over his head.  Alan eventually becomes victim and is paralyzed, and while he's laying down in a coffin, about to be buried alive, a tarantula is dropped on his face while his eyes are wide open.  He can't move as the creature crawls and then stays there.  Soon the coffin lid is shut leaving Alan to suffer with the hair companion on his face, unable to get it off, or escape.