Why...

...do sharks attack you from the back?

and when they do that
they pierce your hindside through their claw like teeth
in a manner that allows you to feel them
but not see them.

But thats not entirely the problem.

What you can see before you're eyes is the problem.
What you perceive you can see accentuates the problem.

And the fact that its all blurring now that you're under attack is the killing problem.
And before you know all this,
you realise, you're -
d
-y
--i
---n
----g
..........
- dead!