When I was in fourth grade, this new girl told my group of friends that if you go into a bathroom, turn off the lights and say "Bloody Mary" three times into the mirror and then turned on the lights again, your face would be bloody. Or you would see the devil instead of your reflection. Or you would go insane. Or something. I'm sure it was a different legend in every school. Some of my friends wanted to try it immediately. Since you couldn't turn off the school bathroom lights without a key, they had to settle for covering their eyes. I opted out, partly because I thought it was a stupid superstition, but mostly because the idea SCARED THE LIFE OUT OF ME. I never could bring myself to do it; I remember thinking once in college that I could just do it and get it over with, but it never happened. Until just a few minutes ago (and the very fact that I'm writing this serves as something of a spoiler). I went into the bathroom, turned off the lights* and said "Bloody Mary" in the mirror three times. And nothing remotely scary happened. Yet.
I need to clean my bathroom mirror.
*Rather I had them turned off; the switch is outside the door.