This happened to me 2 times in the past few months. I arrived at the airport early, loitered around, called a friend, did some shopping & arrived at the boarding gate 20-25 minutes BEFORE departure only to discover that my plane had left me behind! (To clarify: I was at the gate at least 20 minutes before & the plane was GONE. Meaning the gate closed long before I got there.) The best thing was, it still said Boarding on the TV screen both times. I looked before I went to the boarding gate & after I've my flights departed early. I went to the office to complain & I was told that the captain had the prerogative to initiate Annex 22 which he did. I tried to look up this protocol on the internet but could only find a book of flight protocols called Annex 22. I was about to write a complaint letter to the airline company when I realised something...