You’re looking at the sky, and everything is normal.
Then suddenly, lightning flashes across the clouds.

It’s so bright, it feels like the sky just broke open.

A second later, thunder crashes and makes you jump.

If lightning is just light, why is it so loud?

And why does it only happen during storms?

It turns out something invisible builds up inside the cloud.

And when it can’t stay separated anymore, it connects all at once.