The King and the Screw

And here is the joke about the King and the Screw:
Once upon a time there was a rich King. He was really happy and had everything. Except there was a really small problem that was bugging him. He had a giant screw right in the middle of his stomach. Yes, a screw. So he called the kingdom's best doctors and promised a huge reward for whoever fixed this inconvenience  and all that, but none of them could get rid of the screw. He was starting to lose hope when an eccentric doctor came. The guards didn't wanna let him in, but the King forced them to. So he began his healing process. He pulled out a screwdriver and slowly but surely started unscrewing the screw. He unscrewed and unscrewed until the screw, defeated, fell to the floor. And that second, marked the........(suspense, ooh).........DETACHING OF THE KING'S BOTTOM!!! MWAHAHAHAHA!!!