The song Mattias is singing/listening to during the battle is "I Am Hated" by "Slipknot" below are the lyrics and a link to youtube so you can listen to the whole song. The only reason I'm adding this part is because it helps you to understand him on the mental level...remember he's crazy. You'll be surprised when you find what he changed his iPod to in my next post. =]
Youtube.com - I Am Hated
The whole world is my enemy - and I'm a walking target
Two times the devil with all the significance
Dragged and raped for the love of a mob
I can't stay - because I can't be stopped
Eat mother****ers alive who cross us
I know you're all tired of the same ol' bosses
Let me tell you how it's gonna be
I'm gonna kill anyone who steps up in front of me
Welcome to the same ol' ****ing scam
Same ol' s*** in a dead fad
Everybody wants to be so hard
Are you real or a second rate sports car?
They all lost their dad or their wife just died
They never got to go outside - SHUT UP
Nobody gives a f***
it doesn't change the fact that you suck
(We are) The anti-cancer
(We are) The only answer
Stripped down, we want you dead
But what's inside of me, you'll never know
(We are) Bipolar gods
(We are) You know what we are
My life was always s***
And I don't think I need this anymore
Now I'm not pretty and I'm not cool
But I'm fat and I'm ugly and proud - so f*** you
Standing out is the new pretension
Sreamline the (sic)ness, half-assed aggression
You gotta see it to believe it, we all got conned
All the mediocre sacred cows we spawne
Put your trust in the mission
We will not repent - this is our religion
(We are) The anti-cancer
(We are) The only answer
Stripped down, we want you dead
But what's inside of me, you'll never know
(We are) Bipolar gods
(We are) You know what we are
My life was always s***
And I don't think I need this anymore
I AM HATED
YOU ARE HATED
WE ARE HATED
Everything sucks and I can prove it
Everybody dies, shuffle on, remove it
Individuals, indispensable
I'm the paradox deity vessel
...the other side holds no secret
But this side is done, I don't need it
Before you go, you should know you're breaking down
You'll be rotten by the time you're underground
F*** you
(We are) The anti-cancer
(We are) The only answer
Stripped down, we want you dead
But what's inside of me, you'll never know
(We are) Bipolar gods
(We are) You know what we are
My life was always s***
And I don't think I need this anymore
(We Are) The source of conscience
(We Are) Distorted sentients
There's only one thing left
And I can't leave until it's sated
(We Are) The absolute
(We Are) Controlling you
They're closing in, I can't escape
I AM HATED