I think lasers are pretty wack when you think about them through this lens. A small, wand-like object in your hand can make light appear from seemingly nowhere. If it’s powerful enough it can set things on fire or blind people. Not to mention larger ones like laser cutters or the LLD, used to destroy missiles midflight. Thats sure to blow some feudal peasant minds
Wireless telephone and internet would baffle even someone from the sixties.
Wireless phones were around in the 60s. Probably not many people would see them, but may have heard of them at least. They were usually only installed in cars.