In a hospital's Intensive Care ward, patients always died in the same bed, on Sunday morning, at about 11am, regardless of their medical condition.

This puzzled the doctors and some even thought it had something to do with the supernatural. No one could solve the mystery as to why the deaths occurred around 11 am on Sunday, so a worldwide team of experts was assembled to investigate the cause of the incidents.
The next Sunday morning, a few minutes before 11am, all doctors and nurses nervously waited outside the ward to see for themselves what the terrible phenomenon was all about. Some were holding wooden crosses, prayer books and other holy objects to ward off the evil spirits. Just when the clock struck 11, Pookie Johnson, the part-time Sunday sweeper, entered the ward and unplugged the life support system so he could use the vacuum cleaner.