Ben Franklin flew a kite during a thunderstorm to prove lightning is a form of electricity. He was right. Lightning is a form of electricity. Deadly electricity. This has made us understand that flying a kite in a storm is not safe at all.
How does "Electricity" form inside Lightning?
Lightning is naturally created as an electric current in the cloud. As the ground heats up, it heats up the surrounding air around it. Hot air rises.
As the air rises, water vapour cools and forms a cloud. As more air rises, the clouds get bigger. When it rises high enough on top of the clouds, temperature falls below freezing and water vapour turns to ice.
This turns a normal cloud into a thundercloud because small pieces of formed ice hit each other as they move around inside the cloud. These actions all create electrical charge till the whole cloud fills up.
Positively charged particles form at the top of the cloud, while negatively charged particles sink to the bottom of the cloud. When these opposite charges grow big enough- that we see as "lightning". Lightning occurs between these two charges in a cloud, like static electricity, but on a much, much bigger scale.
Static electricity in the cloud become charged, but charges separate in the cloud as positive charges travel up and negative charges travel down until they neutralize.
At the same time "streamers" come up from the ground that forms a pathway to ground these sparks.
Although, most of the time, lightning happens within a cloud, but as mentioned, it can also happen between the ground and the cloud when the cloud has too much negative charge and the ground has a lot of positive charge. In such cases, lightning can pick up on anything and destroy it, including, buildings, roads, vehicles, lightning conductors, lightning protectors, even people!