Yesterday, pulled up chapter 11 and piddled around with it. Today, started fleshing out a scene in chapter 12. Now that I'm doing this, I can see I'll need to rethink this part of the book because there's going to be too much of it--too many lower-key non-action scenes--to hold the pace I'm trying to keep up.

Some general thoughts re. getting this part to move, and keeping it moving: I can integrate plotty stuff I'd planned to bring up later; I can try to think of new exciting plotty stuff to insert; I can winnow out the pieces that aren't able to do double or triple duty (by touching on several threads at once) and get rid of them.

For now I'll just keep writing and revising without a plan, but will keep these options in the back of my mind.