GTR - Jekyll and Hyde

I hear thunder from the mountain
Trying to split my personality
I see burning on the hillside
Darkness till the break of day

The wind that blows
A Dog that bites
Recurring dreams
Another night

Underground through the marshes
Got to keep the hounds at bay, I know
Can't move, my feet are frozen
There's a pounding in my head

The horn that sounds
I'm through the door
My body's trembling
Turn on the light

Is the mirror lying?
I must decide
If I'm Doctor Jekyll
Or Mr. Hyde