Writing challenge #1

Ever get a peculiar feeling...

-When you've seen the same car too many time on random occasions for it to "just be" a coincidence...
-Or when you want to be sick the next day and, when you wake up, you realize you are...
-Or when you feel as if someone's watching you when you're alone in the house...
-Or even worse - when you hear a noise, distinctly a footstep, in the top floor of the house when you're alone and at the bottom floor of the house?
-Or what about when a random stranger walks up to you and starts asking about your personal life...
-Or when you can't quite hear the conversation of two men who keep looking at you with toxic glares?
-Or do you ever get that moment when it's just too quiet?

I'm setting your nerves on end, aren't I?  Admit it.  It's late at night, and you're reading this in the dark with your laptop on your thighs, and you're getting seriously creeped out and want to go turn the lights on.
Or...
If, by any chance, you aren't seriously creeped out or only mildly creeped out, it's more likely you've 1.) never been in any of the above situations, or 2.) you are reading this blog entry in broad daylight with a bustle of human activity around you.  (Of course, I could be a fail.  *wink wink*)

At any rate, here presents my writing challenge #1!
50 cool beans to grand winner, 10 to the rest for trying.  :)

How do you put a feeling of unease, so intense and nerve-rattling, into words?  And from there, how can you use the words to make a reader, reading on a sunny afternoon with no sense of anxiety, still feel the prick of shadows...and echoing footsteps...and dripping waters in cavernous conspiracy lairs...?

I await your ideas with much anticipation!

Write on!
Clove