Always listen to the flight attendants when they come through the cabins with announcements. I made the mistake of rushing my laptop shut down process which in turn forced me to go to Apple to correct the problem. (Which became a 5.5 hour appointment to erase everything on my computer and discover that my back-up disk drive was encrypted.) Now, I’m forced to pay for a file recovery service to retrieve the files from the encrypted drive.
Lesson learned: Either shut down electronics before the flight attendants tell you personally or just entertain yourself on the plane without anything electronic. I know we all have some kind of tendency to assume we know better and ignore people who tell us otherwise but in this case, please just use common sense.