Orderly fashion, my ass!
They boarded the plane from the front AND back entrances simultaneously. The middle-section of the plane quickly turned into a giant clash of grumpy, sweaty tourists who had entered through the wrong entrance and now had to fight against the tide, oversized carry-on luggage in hand, to find their seats.
Once we took a big mental-step-back from the annoyance and frustration of the situation, we realized it was actually quite hilarious!
Oh vietnam airlines.....
ps: last Vietnam picture EVER! (...unless I go back sometime.)