The curse of the mummy began when a series of terrible events occurred not long after the discovery of King Tutankhamun's tomb. Legend has it that anyone who dared to open the tomb would suffer the wrath of 'the mummy'.
Lord Carnarvon, the person who funded the dig of King Tut’s Tomb, died shortly after the discovery. A doctor was sent to examine him but medical attention arrived too late and Lord Carnarvon died. At that exact moment the lights in Cairo mysteriously went out.
Once Carnarvon died the media went ape shit with stories of his death. They claimed King Tut wanted vengeance and announced a mummy's curse, which targeted those who had entered the tomb.