Nightmare Fuel: Re-Animator

  • While most of the violence is quite over-the-top, the appearance of the morgue zombies was painstakingly based on actual corpses of accident victims, and as such is disturbingly realistic and extremely scary.
  • The movie heavily implies that being brought back to life leaves the test subjects in unbearable pain (physically and mentally - the longer the body has been dead the worse), which may very well be part of the reason that they are more like feral beasts than humans. They die and, after West's chemical restarts the body, literally wake up in a living hell where pain is all they know.