^ +1 - seen that & it's happened. One time, I used the "Call Button" to signal the FA to get their attention when I noticed that they went passed us after more than a few minutes (and I was "preoccupied" myself in those pre-iPad/2 days.) Discrete without "disturbing" others around us who're on a different meal schedule. As soon as she came over, she realized and apologized for our tray without the main entree ...