I started a thread recently entitled open figures in waltz. After a week away from my computer, I am now having difficulty re-finding this thread, but as I remember, it had veered off into a discussion of the physics and of swing, flight, rise and fall etc. Anyway I am interested in getting my hands on any papers, books on this subject (ie physics of human movement as applied to ballroom technique), and wondered if anyone could point me in the right direction (which I think was where I got to on the original thread). Thanks.