I've heard this story twice lately- first it was told to my wife by her non-JW boss and then I heard it from my own non-JW coworkers. I have no idea if it is really true but it's a great story.
Apparently a high-functioning but mentally challenged man had his own house close to his parents' house. His mom dropped by to visit him and she wondered where all his furniture was. He was so excited to tell his mother, "I caught a leprechaun!"
His mother went to the room where the "leprechaun" had been barricaded in by the man's furniture. Apparently he was holding captive a midget JW!
The non-JWs who told me this story said it was unusual that this midget was by himself because, as they said, "those Witnesses usually roll four-deep!"