you'd be surprised how things we take for granted can be challenging for others. I still chuckle trying to show my 80 year old grandmother how to use the TV remote to adjust the volume. You'd think the plus and minus buttons would serve as a clue, but in her 80 years, she'd never before seen a TV remote. She also didn't know which way to point it.

You see, the more you know, the more you don't know.

some passengers even try to squat over the aircraft lav, thinking it's a squat toilet (which are common in many countries, not just Asia)...