A woman called the Canon help desk with a problem with her printer. The tech asked her if she was "running it under Windows." The woman then responded, "No, my desk is next to the door. But that is a good point. The man sitting in the cubicle next to me is under a window, and his is working fine."
I once received a fax with a note on the bottom to fax the document back to the sender when I was finished with it, because he needed to keep it.