Here's me trying to laugh through my anxiety attacks.  Most of my immediate family has dealt with anxiety disorders; I've fought them since I was 13.  At the most anxious periods in my life, I have experienced hallucinations, many involving spiders.  This is not hypnogogic / hypnopompic, which occur during sleep or awakening -- this was during regular daily activities.  
During a particularly tough stretch in 2002-2003, I was rather frequently hallucinating that the people around me were turning into person-sized spiders, wearing clothes, often driving oncoming cars.  One day after such an episode, Bowie's "Ziggy Stardust" came up on shuffle play, and after David sang the line that became this song's title, I laughed.  A lot.  For several minutes.  Where WEREN'T the spiders?  So I started writing a list of where the spiders were.
I wrote the chorus/turnaround in '09 to finish it.

Lyrics

SO WHERE WERE THE SPIDERS?
 
In my chair
In my hair
I see spiders everywhere
On my door-
Knobs and floor
I freak out like a crackwhore
Super-big
Dancing jigs
Even as they write “Some Pig”
 
I don’t like the way
They trap their prey
In the webs of lies they say
‘Cause it reminds me of you…
 
In my place
In my face
On some album art by Space
Drunk in bars
Driving cars
(that’s how they got here from Mars)
In my dreams
Sewing seams
Plotting deaths and graves and schemes
 
I don’t like the way
They wrap their prey
In the webs of lies they say
‘Cause it reminds me of you…
 
At the mall
On my wall
Crawling up towards my left ball
On my toe
In my fro
Right by my office window
In my veal
As I squeal
Who cares if they are not real?
 
I don’t like the way
They poison their prey
With the venomous lies they say
‘Cause it reminds me of you…