Vampires will kill their own grandmothers even more willingly than Vogons
Frenzy, also known as Blood Frenzy or Rotschreck, is the state of uncontrollable rage and bloodthirstiness that overtakes a Vampire who is severely injured, incredibly angry, or otherwise loses control of the Beast inside them. A Vampire in this state will lash out at anything and anyone nearby, biting, scratching, kicking, and generally flailing about. They are almost as out of control as a mildly annoyed Werewolf.