You are on board a plane and mid way through the flight. A person sitting near you became excited, restless, very talkative and maniacal following this he became very dull and pale. On examination his pupils were dilated and his body temperature elevated. On fuher examination he had ulceration of the nasal septum also. He later had convulsion. The onboard emergency kit with glucometer relieved his blood sugar to be 150 mg/dl. He also had arrhythmia. Despite resuscitative and suppoive measures he died before the plane landed. What is your diagnosis?