I have a question that I thought some smart egulleteer might be able to answer. I've seen and experienced cheaper/lighter cookware rock around on a hot burner. Even if you take the pan off and then set it back on the burner, the rocking will start up again right away. I have a couple of ideas as to why this might happen, but was just curious as to the real explanation. I figure it must have something to do with the materials, the weight, and a warped bottom of some sort. If anyone could explain I would be interested in knowing why... Thanks again!