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
A remote control or any bluetooth-enabled devices. It’s like spooky action at a distance. Just press a button on a little thing and it can make something else across the room do something on its own.