I sense a definite difference between native american followings and superstitions. There is a great little book that gives the origin of superstitiions, and it can enlighten all those who read it. For instance, "knocking on wood" for good luck came from a time when ppl believed evil spirits live in wood, and by knocking on them when you speak something hopeful, will keep them locked in the wood. Even Einstein would want more proof of such phenomena, eh?