The internal struggle of every engineering student when someone brings up perpetual motion machines! First instinct: "I don't have time to explain thermodynamics to you." Second instinct: "But if I don't correct this fundamental misconception, I might spontaneously combust."
This perfectly captures the engineering dilemma - do you politely ignore scientific impossibilities in casual conversation, or do you become that person who can't help but explain why the laws of thermodynamics make perpetual motion machines impossible? The struggle is real!