10 Pts. to first right answer?

I'm in a happy happy mood and feeling generous too! Below are a sample from the lyrics of one of my favorite songs. First answer gets the points. I'm just having fun.

"You raise the blade, you make the change
You re-arrange me 'till I'm sane
You lock the door
And throw away the key
There's someone in my head but it's not me."

Good luck.

Brain Damage/ Eclipse-- by Pink Floyd. One of their best

Brain Damage - Pink Floyd

"Brain Damage" by Pink Floyd.

I love that part of the song, I used to sing it a lot some time ago, felt kinda identified, hah.
Great song. Great band. I love them.

The lunatic is in my head...