^^ Talking heads
And I'm not saying add just description, though that's a big part of it. Just write it like you plan to write the rest of the novel. Here's what I mean:
'I'm seeing things that aren't there,' I thought to myself, 'I'm having murderous feelings. I can't control my anger.' I'm going mad. I must be. A hammer bounded from one side of my skull to the next, trying to break free. Groaning, I clutched at my head, trying to make it stop, begging it to stop. Please, please, stop.
I killed him.
No, I didn't, I couldn't. Why would I do that? I didn't mean to-- I didn't know--
I killed him.
I fire lit through my head, making every thought thrum and spark. I began to rock on my heels, fingers digging into my scalp. The fire, always the fire...
I wasn't sure what you meant by the fire, if it was literal or figurative, decided to go with figurative in the end. Just my own interpretation, of course, what I imagined to be happening. In any case, if you write it like that, add something more than the dialogue/thoughts, then it'll be smoother, easier to read, and a much more effective hook. And, if I was totally off in my interpretation of it, well, if you write it like that, then you can show what's really going on and make sure the readers get it straight.
