Central American propeller

A creature from the folklore of the American colonists. 

Its head is attached to its body by a swivel neck; as is its short, tapering tail; both can be rotated at a speed of one hundred revolutions per minute. The body is long, triangular, with three full sets of legs; this is a great convenience in an earthquake-prone country, since the animal is not disturbed by earth tremors. If the floor suddenly becomes the ceiling, it's not. It doesn't matter, because the propeller is always close to your feet. His hair is bristly, all tilted forward at an acute angle.

The only successful way to kill an animal is to put it in a chimney so that all its feet touch the surface, when it immediately starts walking in three different directions at once and is torn apart.