Glass formed by lighting hitting sand

That is the raddest thing!!

When lightning hits sand, it forms what is called a fulgerite.
That is not a fulgerite. This is:
https://en.m.wikipedia.org/wiki/Fulgurite.
This is probably just slag.

It's also a month old direct rip off from reddit. I only mention that because the title is exactly the same.
https://www.reddit.com/r/Damnthatsinteresting/comments/9h9srj/glass_formed_by_lighting_hitting_sand/

Lightning *