A move and first ever bump
Boarding a flight from HGK to NRT, I walked back to one of my favorite seats on a 747. Seat 63A is the first row that has 2 instead of 3 seats between the window and the first aisle. The pax with the ticket for the aisle seat was sitting in my window seat, but he had no problem with moving at my request.
A few minutes later the GA walks up, asks my name and gives me a pass to the front of the plane! First time to be upgraded, and it's for a long international flight. I was thrilled. If I had moved over only one seat, no problem, but if I had moved out of sight and hearing range, would they try and find me or give the upgrade to someone else?