Shit happens. What makes this so interesting is the speed at which the shit tsnuami spread. Try rolling out a little more slowly so less of the world gets affected.
For those affected, consider it a relatively painless test of your DR systems, and a chance to fix 'em up.
I think I've seen this animated (... -> -> . -> .. -> ...), this is quite good. But the animation is important. Without it user can think that the app froze, especially in the world where every other app shows some sort of animation.
Yeah, works only the other way: the fact that the loader is still means one of two things — either the app is completely stuck or it ignores UI conventions of the last decade (which can be good or bad, depending on domain).
Yes, it's at the end of the document. Penalties will be assessed once fact discovery is complete. Monetary damages of legal costs related to this issue are to be presented to the court by the plaintiff.