You said when that moment comes and I think it is more of a question if it comes. You see, what happened to your friend is not a common thing and you should not be so sure it will necessary happen to you too. That is why you should not be obsessed with it and dont waste time worrying about things that will, probably, never happen. If I were you I would just relax and concentrate on the game and not on some fictional stuff that other people are telling you. I never heard of anybody else whose screen goes black on Final Fantasy XI character creating screen, if it is any consolation to you.