For Lucky it's not the kneading, it's alot faster. She kind of stiffens her front legs then really fast kind of kicks them back. Just think of a dog digging a hole under a fence with it's front paws. It's kind of along those lines. I was being silly one night and made a little song about it, "Digger Cat". It's basically the Spider-Man theme with Digger Cat substituted for Spider-Man. LOL I'm not that creative.
Sing a few bars for us.