obviously the nasa camera was somehow affected by extraneous circumstances (example: a person's thumb was making a shadow over that part of the earth)
Man, that's one pretty big thumb right there, especially considering that all of the millions of people affected by the thumb have turned their lights on, while the millions of people not under the gigantic thumb haven't.
But if instead you're talking about a normal-sized thumb interfering with the camera itself, then
you wouldn't be able to see anything past it. Not countries, no lights, no nothing. The thumb would be in the way. Not casting a gigantic shadow;
it would be in-between the lens and the subject. That is to say, if you haven't got it so far, you would just see a blurred thumb in the way instead of all the pretty lights.
Seriously, do people think before posting around here, or does it go the other way around?