Writer's block

I'm stuck. I have no idea what to write. I've got about 101.000 words now, but I have no idea how to start the next chapter. There's so much I have to write about in this chapter, but I have no idea where to start. I've tried about everything, including ninjas, but I haven't gotten a single line down on paper yet. I *hate* writer's block. Also, what's the point of triple physics?

Help.