The original tale is by Alan B. Combs. It led to a pun cascade on PUNY.

Folk-monsters are a part of the underculture in many countries. Fear of bogeymen, vampires, werewolves, dervishes, zombies, and other such unfriendly life forms (speaking loosely) is part of being human. I have recently become familiar with a fairly well-described Hispanic entity. This fearsome creature is a modern affliction, combining the very worst aspects of military helicopters with a peculiar abuse of goats. Found mostly … Read the rest...