A peculiarly scary thing was happening in a hospital's ICU. Every Sunday, with unfailing regularity, patients on bed number 5 died at 11 AM. This puzzled the doctors and some even thought that it had something to do with the supernatural. To investigate the cause of such bizarre incidents, the doctors and nurses decide to keep strict vigilance. A few minutes before 11 AM, the part time Sunday sweeper arrived. Whistling cheerfully, he unplugged the life support system of bed nnumber 5 and put the plug of his vacuum cleaner in it place!