It's day four, and I'm experiencing the bane of all writing marathons: burnout.
My story is going great (it actually has a plot! Wow!). My characters are interesting, complex, and have totally different life stories. I'm really in the swing of things, as far as story is concerned.
But I'm tired. It just gets hard, after three hours of staring at the screen, and checking the word count every other paragraph, and getting up to use the bathroom, and staring at the screen some more.... Sure, writing happens. I'm getting more done then I usually ever get done on a single project. But writing happens s...l...o...w...l...y...
On the bright side, the chocolate fish is holding out.
I'm a 45,000 words.