It was one of those airport buses back from the plane to the terminal. Usually a very short but often rocky ride, where you seem to get thrown round corners. Never enough seats and more than half of passengers will be standing.
I was one of the first passengers off the plane so walked the length of the bus and sat, more to be out of the way than to grab a seat.
As more passengers joined a woman got on with two very young children. Too small to reach anything to hold onto. I could see what would happen when the bus started moving, so got up so the children could sit. When mum asked them to share the seat I'd vacated the man next to me also got up.
I'm a woman approaching sixty. I'm perfectly capable of standing, but in a traditional hierarchy of those who "should" give up their seat, there were lots before me and several nearer to the family in need.
Would you have stood? Why didn't anyone else?