In Sephiroths ultimate form the japanese version is Seraph; they just mangled it in the translation to english, it is now Safer. (Terrible don't you think)? But I honestly think 120000 (correct me if I'm wrong) HP is a hell of a lot different then a health bar. But yes Sephiroth did move at the speed of light in Advent Children. Plus, lets not forget that little "accident" in the Shinra building. And its absured to put Super Nova out of the picture.