This description is from this website :
http://mentalfloss.com/article/1264.....-monsters-asia

The Penanggalan
is a Malaysian vampire-type monster, who separates at the neck and flies with her entrails dragging behind her. During the day she appears as a regular woman, but her head flies off at night so she can flit around terrifying people, and supposedly eating newborn babies. Rituals for protection against the monster (or just luck) are used for pregnant women or when a new baby is born. The Penanggalan smells of vinegar, because she must clean her dangling entrails with it and stuff them back into her body through the neck by morning. How did she get that way? Legends vary, but she supposedly was a normal woman until someone startled her so badly that her head popped off. The monster is called by other names, such as Hantu Penanggal, Leyak, or Krasue, in other Southeast Asian countries.