Michael Jacksons mother was a JW, and M.J. had to go door-to-door with his mother when he was a kid. One day they rang the bell at some big, fat guys house. They guy was in the middle of taking a nap,and got really pissed of from being interrupted, and started yelliing at M.J. and his mother, and the guys big, mean-looking rotweiler came to the door, and joined in, barking.
And hence, the Moonwalk was born.