Soooo you are telling me that we still haven't fully understood something as fundamental as lightning and it's still an active area of research...
Never mind this kind of lightning, it gets really interesting when we start to look at ball lightning, which is very real but rarely sighted.
Not to be flip, but, depending on what "fully" means, we haven't fully understood much of anything about the real world.
It is cool that something so seemingly ordinary is extraordinary.