I love it when those super productive plot bunnies come to visit.  Those days when ideas for new plots, or new exciting twists for a work in process come streaming in hard and fast, and supply writing fodder for years to come.  But then sometimes you have those moments when you hit a brick wall writing a story.  You’re scribbling away, and then—.  Something needs to happen, and you realise that you haven’t got a clue what that something should be.  You think, and you think, and you stare at the screen.  You squish your face with the effort and hurl expletives at the world in general.  But still nothing comes.  A great big pile of nada.  It can be quite a frightening moment, and if you carry on pushing yourself for days or weeks to think of what comes next to the exclusion of anything else, you will end…