A significant portion of Chapter 2 and Chapter 3 were written that way.
I sat/stood/paced around at home / in my car while driving / walking down the sidewalk...
When I had an Idea, I would open my texting option, select my own phone number ("message to self"), tap the microphone on my text keyboard, and speak the lines of dialogue, having conversations with myself as various characters.
Later, I would transcribe or copy-paste the text over to Word or Google Docs and edit it for grammar, context, and spelling. I preferred to do it "offline" since there was a noticeable lag between my phone and Google Docs, often resulting in completely ignored phrases or words.
Jamleng would then refine, reduce, and simplify the epic 20-30 minute scenes into manageable, renderable 5-10 minute scenes. Not sacrificing much, or simply splitting longer stuff into 2 individual moments instead of one long-winded segment.