JP, best wishes for a speedy relief, from me here in sunny South Africa. I've got that back thing too, though not from carrier landings, nor probably as serious as in your case. I got mine by being stupid with heavy weights when I was a gangling teenager. Tried to outdo an older boy. Ruptured disc, with accompanying spasms. Also best wishes to Yvsa, for recovery. Haven't heard myself about the concern for Yvsa before now, due to less frequent visits to the forum, but whatever it is, my prayers as well.