"Yup. Something did come out when I sneezed earlier."
That's the problem with sneezing while gaming. Usually you're all good, but if you aren't, you'll find out later when there isn't a million colours flashing around the screen and ya gotta wet it again to wipe it off properly... Of course you could just cover your face, but that's when the school kids seem to know exactly when to kill you.
One of my monitors has had a couple of dead pixels for a couple of years. I still find myself wondering sometimes if that dark spot is part of the image or just my crappy screen.