He had finally got his chance to make the Really Big Sale. He was going into the final interview on the biggest contract he had ever written. As he was ushered into the office of the executive buyer, an assistant brought her coffee and left. The atmosphere was cordial, and he knew he was giving his best presentation ever.

Then the assistant tapped on the door, re-entered the office and spoke briefly with the executive. She stood and said, "I apologize, but I have to tend to a matter. I'll just be a minute or two." And…