" A celebrity sighting has to happen in your world, not theirs. You can’t very well, for example, get a job as an extra on Coronation Street, perch yourself on a bar stool in the Rovers and sit there, stroking your chin, saying, “blimey, that’s Rita from Coronation Street.” Also inadmissible are celebrity sightings that took place through a celebrity’s bedroom window or at the bottom of a pit you dug. "