Bright and Sparkling Cleaning London

In a hospital's Intensive Care ward patients always died in the same bed, on Sunday morning, at about 11 a.m., regardless of their medical condition. This doctors were puzzled and some even thought that it had something to do with the supernatural.
No one could solve the mystery why the deaths occurred around 11 a.m. on Sundays. So a World-Wide team of experts was assembled to investigate the cause of the incidents.

The next Sunday morning, a few minutes before 11 a.m., all doctors and nurses nervously waited outside the ward to see what would happen. 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 that he could use the vacuum cleaner.