Drop bear

A drop bear (sometimes dropbear) is a hoax in contemporary Australian folklore featuring a predatory carnivorous version of koala. The hoax is commonly used in tall tales designed to scare tourists. While koalas are typically docile herbivores (and notably, not bears), drop bears are described as unusually large and vicious marsupials that inhabit treetops and attack unsuspecting people (or other prey) that walk beneath them by dropping onto their heads from above.