Holy Brain Cages, Batman!

I could die tonight and not feel a thing
because I'm numb to the pain, but I dont miss a thing.
I got music in my head like I'm drummin' away
It plays so loud it over shadows the noise and the rain.
A finger on the trigger and another on the bombs,
I don't know you at all, but I'll blow you away anyway.
I can kill you, though that could mean death to me,
'till I end up with a knife in my back, I'll keep fighting.
Even numb to that pain, I can't keep breathing.
It only gets worse, just before it gets better
even at rock bottom, it can still get lower;
But it's in me to keep fighting, my middle finger on the trigger is my preface to you. 
As that bullet exits your brain-
I got a trophy on the wall to show, forever in place. 
Kicked down and stomped on I'm bloody on the floor,
but i get back up and fight, 'cause i've got something to fight for.