Nepal, March 16 -- "Gimme a plastic bag, please," the exhausted passenger sucked in air, grit her teeth and moaned to the cleaner of the passenger carrier four-wheeler at Falate, a little above Ridi, proving wrong yours truly's worst fears that she may have emptied it all out during her journey thus far. I was to know later from a fellow passenger that this passenger had started vomiting right from Tamghas, the starting point of her journey.

Before writing further about the passenger's ordeal, let me clarify that I have no intention of making fun of her. Let me dwell a bit about motion sickness, which I think was the cause of the passenger's suffering. As far as I understand, motion sickness occurs when your body cannot adjust itself wit...