I've done that at Walmart. Have folks coming in the exit while I'm trying to leave and look at me like I'm in the way, I'll look up and say really loud: "EXIT! what's that mean?" Then usually say something along the lines of being illiterate. I've had a couple of folks try to call me out on it to try to save face. They usually walkaway looking even more like idiots when I stand there and define what "exit" means, how they obviously can't read or understand the definition and how inconsiderate they are.
