When I got the Minecraft demo for PC, I didn't know about any mobs besides the creeper. So, I found a peninsula, and built a little wall inland. The only way to get to me was by water. I punched out a little hole so I could peek over the top. I looked into a nearby forest, and then saw two horizontal pink rectangle appear right on my crosshairs. [i]Huh, the graphics must be glitching out[/i], I thought. (This was back when Endermen wouldn't move until you took your crosshairs off them.) So, I turned around to check the waters for Creepers (Remember: that was the only hostile mob I knew.) My patrol complete, I climbed back onto the walls to look at those "glitched graphics". The second I peeked over, I was jumpscared by this tall black thing holding a block. It unleashed a scream that I will never forget. (I had my speakers all the way up so that I could hear the hiss.) I was like Nope. I deleted the world, restarted Minecraft, then took it off my computer.