A postman tried to deliver a parcel to a house that belonged to an elderly lady who owned a Parrot. He had been cautioned that the lady was hard of hearing and that he might have to shout so she could hear him. When he rang the door bell a voice cried "who is it"? He said "It's the Postman" in a loud voice. Short pause and the voice said "who is it" again. He shouted in a loud voice "Its the postman"
Still the voice said "who is it"?   By now the postman was getting very frustrated and was shouting loudly "Its The Postman" several times, until a heart attack killed him stone dead. The lady of the house returned from shopping and almost tripped over his dead body in front of the door. "My goodness who is it"? she cried, and a voice from inside the house said "Its the postman"