If I get into work this early, the water-boiler hasn't heated up properly yet, so what I actually get when I put supposedly-boiling water on my instant coffee is just a mugful of half-separated brown sludge-and-water.
Still, I've tasted worse. And it has caffeine in. And it passes the time.
Update: Apparently they were in the middle of descaling it. So what I drank was coffee-and-water-and-descaler. Oh well.