Sometimes you're sitting in a quiet room
and you hear a faint whistling sound.
It's not continuous, it comes and goes.
It seems to be very near.
You feel that this isn't good.
It's as if someone is very close by.
But they're not.
Just the quiet whistling.
It's not even a whole whistle.
More like a 'ffffff' then a pause and another 'fffffff'.
After a while, you realise that it's your nose.