This thief was startled by an alarm that he had triggered while trying to get back out of an East London museum he was burglarizing. As a result he slipped and, well, you can see what happened.
He then screamed until a man driving by heard him and alerted police. When the police arrived they had to saw the 30cm of steel from the fence in order to free him safely. The spike was later removed and found to have damaged his rectum as well as his intestines.

I mostly like this story because I think that this is the first time ever in the history of all ER's that they have heard the, "I slipped and fell on it", story and it was true.