As I am wont to do, I was listening to This Week in Parasitism. The world is a weird, wild place.
As you could guess,
do not follow this link if you are at all squeamish.
You should not look at this video either. Its title is "Giant Kidney Worm," and it's about the surgical removal of a giant kidney worm. (There is a happy ending, though.)
http://www.youtube.com/watch?v=5ob6S_EqR1c
Forgot to add: