I saw a dancer doing a shimmy that involves lifting the hip upward, but using the muscle on the side of the waist and contracting the glute while both feet are firmly planted and the knees kept fairly still. It is a lot more subtle of a move than the shimmy driven by the knees. Does this move sound familiar, and if so what is it called? I've been trying to do it but can't seem to contract the side muscle, so was hoping to find a tutorial on Youtube.