You forgot to mention trying to find their seat in the first place
Walking on the aircraft trying to figure out which seats are ABC DEF, the concentration required...
Of course I mean this in all good fun, it's just funny how thick people become as soon as they step onto the aircraft, or probably the airport.
Another of my eye-rollers is when they step on the aircraft at L1, and they say 'which way do I go'. Do they really think there are rows forward of the flight deck?