Spaz Fingers

Never have seen this before (that is, with other children), but my quirky, spunky, hysterical daughter, Miss Woo Loo, does this bizarre thing with her fingers sometimes when she's enjoying a yummy smackeral of something! She doesn't manipulate the fingers of one hand with the other, no, her fingers just twist and "clip" onto each other on their own. I think it's so strange. She thinks it funny that I react to it. She's one-of-a-kind, that's for sure.