The failed salesman Don Angelo looked at his host pair. He looked really hard at them. "How can they be so stupid?" he thought. "Have they really not heard of our products before?" The man spoke. "We know at you want to give us a plesentation of a ploduct, but we do not undelstand what the ploduct is. Please give us anothel physical plesentation." "OK", thought don Angelo. "One more time. But that will be the last time." Then he began his presentation. "Our product is our own invention; the helicopter. It is a flying vehicle that goes BZZ, BZZZ, BZZZZ..." and he buzzed with both his hands and his mouth. When he had finished the man spoke again. "That was a beautiful plesentation and the ploduct seems intelesting. But unfoltunately shall I say that we have no need fol it. We shall not buy youl ploduct. Falewell, and have a nice tlip home." "Farewell", said don Angelo and travelled back home to Italy. When he had gone the woman spoke. "He was so stupid", she said. "Does he indeed think we would need some helicopters when we have the ornithopters?" "I agree with you, my dear wife", said the man. And he smiled.