Disk 11
About Disk 11 I think someone is in a mine or cave they they are being chased and try to light a portal or a torch(torch idea is from this article http://www.minecraftforum.net/topic/947861-11-the-music-disk-my-explanation/). Any way they cant light it so they run away out of the cave jumping up the stairs or walking out of the cave or mine its stone dirt/gravel some people say its something to do with Herobrine...