This sounds pretty interesting. I am yet to fully grasp the lightning network is all about, although I learned that just like the name sound, transactions done on the network are close to the speed of light. Hopefully I will have the opportunity to use it someday in making a purchase or payment for a service. But until then, the pizza looks yummy. This unrelated though but this story kinda reminds me of that guy who paid his pizza with 10 bitcoin.
Lightning is awesome for small purchases, but I would still not put a considerable amount of Bitcoin in there. The only bitcoin I trust is the one in the blockchain.