I'd like to call the following glitch, the Terraria Glitch. It kind of looks like a Terraria World, yet in Minecraft. This happened on a superflat world.
Brother, Notch created it but it was named "2D Glitch" The glitch is created when you played so much default , large biomes or something related to that. I thought it was fixed.. Oh well., Who wants Terraria in Minecraft? :D