The next night at a few minutes before 8 o'clock, Ned parked across the street from the parking lot. As he expected, the lot was empty except for the truck from the janitorial services company. Ned put his ear to the door and heard the vacuum cleaner running. He knocked at the door very loudly, and stood there waiting in his suit and tie, holding his well-worn briefcase. No answer, but he was patient. He knocked again. A man from the cleaning crew finally appeared. "Hi," Ned shouted through the glass door, showing the business card of one of the partners that he had picked up some time earlier. "I locked my keys in my car and I need to get to my desk."