After too many days of breadsticks and cheese, one begins to wonder when the next bowel movement will arrive. After day 3, somewhere deep in the black chasm of your bowels lies the fabled balrog - a dormant beast no man ever wants to encounter.
When a person is diggin in their own butt to get at an itch, but goes too deep and unintentionally unearths a fart and/or poop on to their own hand. Just like the dwarves of Moría.