There is really no describing the sensation of being watched. I have heard it called a prickling at the back of the neck, and even a consciousness of eyes that seem to float in darkness, but it is neither—at least, not for me. It is something akin to a sourceless embarrassment, coupled with the feeling that I must not turn around, because to turn will be to appear a fool, answering the promptings of baseless intuition. Eventually, of course, one does.