So I was listening to room the where it happens as one does, and I realized some stuff. You could make this super suicidal and (it kinda already is) his decent to insanity.
1) Click boom then it happened- It could easily be a suicide attempt. Click boom (obviously) represents a gunshot. Then it happened- he shot himself.
2) I feel like when he asks Hamilton why he did this, Hamilton would be saying everything with a smirk. I feel like Burr would be holding his head in between his hands having a panic attack
3) Hold your nose and close your eyes- This could represent another suicide attempt. Hold your nose either being suffocation or him trying to drown.
4) Dark as a tomb where it happens. After death he would be placed in a tomb and go underground, correct? So of course it would be dark as a tomb where it happens!
5) Click boom. This could represent his final attempt. Shooting himself again. Since this is the last line in the song, he may have died.
I also feel as if Thomas, Madison, and Hamilton are demons making him fall further and further into insanity, making him feel worthless. Hence why he wants to be in the room where it happens.
The room where it happens could be the afterlife or death. Since we have no clue what it’s like in an afterlife or death, no one else would be there to tell the tale. His demons, since they might be a result of death, would be the only ones he could speak with in the room where it happens.
I’m thinking on my feet, so this may not be sound..