You ever had one of those days where you struggle to write anything at all, all day long? Like you have no idea what happens next, or how you're going to tell whatever happens, or anything? And then suddenly something just clicks and you power through five thousand words in as many hours?
It's one of the best feelings I ever get as an author - easily in the top five. I think it might be my equivalent of the thing Arnold Schwarzenegger said about pumping iron (if you don't get it, don't ask).
Just happened to me.
That's all. Carry on.