Today's Coffee Drama

So today this guy walks in and orders his usual, black coffee. You know the deal right? He's been coming here for years and always gets the same thing. But I must've zoned out or something because when I gave it to him, he looked at me like I just handed him a cup of water instead of coffee. 'You know what this is?' he asks, as if I don't have my barista degree hanging on the wall. Sure enough, turns out today was one of those days where even the simplest orders got messed up. At least it wasn’t anything too bad, I mean, black coffee isn’t exactly rocket science. Maybe next time I'll just stick to handing out water.