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 similar series written by an engineer whose character goes back about 10 years before the Mongol invasion of Poland. He uses his skills to fast-forward society into the age of steam while simultaneously avoiding being burned as a witch: https://en.m.wikipedia.org/wiki/Conrad_Stargard
Unfortunately, the author has had some JK Rowling moments, but I really enjoyed the books.