Lyrics:

I'm in your head like a rat in the walls (3x)
Ohh (4x)

Every single night when you're lying in bed,
you can hear a scratchin' in the back of your head.
I don't know what I did, but I'm under your skin;
I'm on your mind and you can't get me off.

You try to get away, get away, get away (3x)
But you keep coming back.

I'm in your head like a rat in the walls (3x)
Ohh (2x)

Just like a horse coming back to the stable,
I know you want to leave me, but you are unable.
It's instinct now just like ringing a bell; Pavlov would be proud.

You try to get away, get away, get away (3x)
But you keep coming back.

I'm in your head like a rat in the walls (3x)
Ohh (4x)

You try to get away, get away, get away (3x)
But you keep coming back.

I'm in your head like a rat in the walls (3x)
Ohh (2x)

I'm in your head like a rat in the walls (3x)
Ohh (4x)