Most of us use to experience thunderstorms from the ground. Some unlucky ones (like me when I took off from mexico) finds themselves scared at flying into a thunderstorm and see their plane hit by a lightning. During my trip to reach China, somewhere above Russia, and for the first time ever I've been flying above a night thunderstorm.
Just imagine our plane was under the sky full of stars at night and about 500m above the clouds, so flat that one could mistake it with the ground. Almost everybody was sleeping, the engine's noise was quiet and regular. There were no real lightning to see like when we're on he ground, but just a very violent light spreading within clouds, 2 or 3 kilometer large. As far as I could see, those lights were appearing and dissapearing very suddenly under us, so easy to see in the darkness of the night.
Probably only the ones who saw it by their eyes understand what I'm trying to describe, but it was truly fascinating. And when one of those lightnings started from just under the plane to go somewhere to the russian ground, we realise how small is a plane compared to the world and its nature.