I first noticed the same thing on a flight from New York to Liberia, with a stopover in Nigeria. When we landed in Nigeria, everyone began clapping. I thought it was a Nigerian thing, but others on the plane said they've seen it when landing in other airports also.
During my unappreciated work and family life, I've often wanted to go back to the standards when I was a baby. Eating, burping and pooping would all elicit massive amounts of praise and accolades.
I've always told myself those days are gone forever, but apparently not. I just need to change careers and become an airline pilot. It's a lot easier than becoming a brain surgeon, and the praise is higher.
Wouldn't that be a fine thing. I kind of wish for that too. Just finishing a good poop and a horde of people start clapping, singing and congratulating you. That would be fab.
I too have quite the unappreciated job. It would be smashing to have a clap and a cheer now and then lol!!!