Was hoping to see the part where I learn how to become a real-life Flash, But all I saw was pain.... :(

This was well researched and written, well done. While reading a part caught my attention.

...which primarily originates in the thundercloud and terminates on an Earth surface (but may also occur in the reverse direction)...

My interpretation of this statement sounded quite strange to me. Does this mean lightening can sometimes originate from the ground?