Bah, 5001 I just hit 6020.
God, I just had one of those moments where I'm writing and something happens that causes something else seemingly minor to happen and then, suddenly, it hits me that my character is about to have a signifigant something happen to them that explains part of their motivation and shapes their progress in the plot, but it's all stuff I never planned.
Love that feeling.
I think I'm going to call it a day for today though. We'll see.