Thought missing

I had a thought. It fleeted by, somewhere in the periphery of my mind's eye. When I turned to look for it, it was gone, probably hiding under the futon with the cat.

Where your eyes don't go a part of you is hovering
It's a nightmare that you'll never be discovering
You're free to come and go
Or talk like Kurtis Blow
But there's a pair of eyes in back of your head
They Might Be Giants, Where Your Eyes Don't Go
(Their most profound song, by far.)