Rabbit ghost, or apparition. From Brittan/Welsh folklore. Sometimes seen as tall as a man. Could torment people, like tricksters, (mucking around in your fields and crops), but were also known to help and warn people. Has made its reapearance in pop culture in films, animation, cartoons & evil bunny iconix.
The rabbit-man apparition seen in the film Donnie Darko(2001) is an example of a modern pooker tale.