When your blood pressure falls to a very low level and your breathing slows and finally stops, that's a sign you are in your "last days."
Gray hair, walk with a cane,back bent so over cant straighten up
Glasses,false teeth,cant handle all the new gimiks,like e-mails.
cell phones,twitter,needs a bath stool,cos cant get in bath,so must
have shower only...waiting to close the eyes for good. last days....
Nathan & Mouthy - Point respectfully taken
So perhaps these doomsday prophecies are geared more to our own human experience? Budda said that "life is suffering". Is the suffering in our lives the fulfillment of the Great Tribulation?