Klein-gordon Memes

When the Klein-Gordon equation transforms you into a blind person with a cane! That textbook just casually drops relativistic quantum mechanics like it's ordering coffee. The equation describes how quantum particles behave when moving near light speed, and here's Bart Simpson, navigating through school hallways because the math is so impenetrable he might as well be blind! The "we" in the textbook is that infuriating royal "we" physicists use when they mean "I'm going to skip 17 steps and expect you to follow along." Physics textbooks be like: "Clearly, it's obvious that..." NO IT'S NOT OBVIOUS AT ALL!