One time I was just finished playing 8 hours of Minecraft, 7 hours of that in a ravine and huge loving cave system, then when I got up, my light went out (I have a mod for MC that makes torches pop off the walls after 39+ minutes), so I went to get a new lightbulb and I saw an enderman in my hallway. I shat brix.
Another time, I was playing CSS and when I got up to make a PBJ sandvich, I heard the CSS knife sound when I was spreading the peanut butter.