I was alone in the elevator when a voice came on the intercom and asked if any lights on the control panel were lit. The elevator's computer was having problems, the voice explained.

As I was replying, a man stepped in and I could see from the expression on his face that he thought I was talking to myself. I told him that I was speaking to the intercom, but, to my dismay, the device remained silent. "Come on," I pleaded into the speaker. "This guy thinks I'm crazy." No response.

We reached the man's floor and he exited. But just as the door closed, a hearty laugh came over the intercom. "Did he get off?" the voice asked. "I'm sorry, but I just couldn't resist!"