Ever wonder what would happen if you poured cement up someone's butt?

It will harden, turn into a cement turd and you will have to go to the emergency room. But that's not all, your case might turn into a official medical document, with pictures of your stone turd. They will find the ping pong ball that you failed to mention, hiding up there too! 

(Yeah its an old story, but just as scary!!)

Rectal Impaction Following Enema with Concrete Mix by Peter J. Stephens, M.D., and Mark L. Taff, M.D. 

from the American Journal of Forensic Medicine and Pathology 8(2):179-182, 1987.

"Upon further questioning, the patient said that approximately 4 hrs earlier he and his boyfriend had been "fooling around." After stirring a batch of concrete mix, the patient laid on his back with his feet against the wall at a 45-degree angle while his boyfriend poured the mixture through a funnel into his rectum. After the concrete mass hardened, it became so painful that he sought medical care.  "