The nightmare

Is the nightmare any less real?

I thought I heard the knock of death
While lying in my bed
But it wasn't my friend's chilling breath
But a nightmare in his stead.

I felt like I was falling
Through the mattress, through the floor
Someone unknown was calling
Then began the roar

A mighty growl, louder than Hell
Grew louder as time passed
And then a scream, clear as a bell
Told me to get out fast

I sat up quickly, pouring sweat
Struggling, hard to breathe
Realizing my sheet was wet
I know he almost had me

I thought I heard death knocking
Was really not he at all
The sound of which was quite shocking,
I'll never forget Satan's call