A WordPerfect tech had been fielding support requests
          from a lady for several days who was periodically having
          "garbage" appear onscreen as she typed. (This was in the
          late XT-early AT days.) He had done everything possible,
          both in the manual and out of it, to correct the problem.
          Finally he came to her office, sat down and told her just
          to go about her routine and let him know when it
          occurred. A few minutes later, she shrieked, "Over here!
          It's happening!" As he watched, garbage was indeed
          appearing on the screen. And he looked down at the
          keyboard... The lady was very nearsighted [and so sat
          very close to her desk]. She was also quite, um, well-
          endowed.

     I would like to have been in the office as the embarrassed tech
     gave her the technical explanation...