Or Did They..?

Running through nothingness
From something you can't escape
Shuffling and snuffling
Can't see because of the sweat
Hair matted to the back of your neck

Spin to look behind you
Nothing but black
Turn slowly with your heart slowing
Face! right there! Centimetres away
Racid breath, sunken eyes

You scream
And your dream fades
The nightmarish things gone
Back to the black depth from whence they came

Or did they...?