Rap, Tap, Tapping

That knocking
Incessant knocking
That rap, tap, tap
Always there, never stopping
Where is it?
A wall, a door
It’s sudden, it’s loud
Where is it, I know it’s there
I can hear it,
But cannot see it
Where, where is it?
Is it above?
Below?
Right beside me?
It sounds so close, but I cannot find it
It starts, it stops, like one is waiting for an answer
But no matter how hard I look
There is no one there.

It is not quiet, Oh no
It invades my head, driving me mad
Am I imagining it?
I no longer know
What I do know, is that it is still there
Never stopping
Always knocking