Sometime during the course of writing a book I reach a point where something small clicks. Then the scenes start forming in my brain one after the other, and I worry that I won't be able to write them all down in time and that some really really good things will be lost in the flurry. So I type notes, and hope for the best, because some of this stuff that's burning a hole won't be written in full for another 2-3 weeks.