The trouble with fancy photography (which National Geographic is famous for) is it can make things look far more spectacular or "otherworldly" than real life. Apparently this lightning can't usually be seen by people, occur above the clouds, and in the blink of an eye. You could be looking right at it and not notice anything otherworldly. Well that's not impressive. You can also see otherworldly things just by watching water move up close or looking at space through a telescope, or using an instrument to visualize EM fields or whatever. I expect those things to be otherworldly because they are.