Where does the sinking feeling come from?

Where does the sinking feeling come from?
How can it pull and push at the same time?
How does it suck inward
so far that it lugs itself inside out and back
again just so
tight
with you stuck to its sides?
How does it crush from the shoulders
down and in, but leave the head
alone enough to know just what is going on–
and still send the head debauchedly spinning around its gravity?
How is its silence louder than any music?
Where does the sinking feeling come from?
How was it made so potent?
That place is surely a battlefield of sorcery.