The infamous music disc 11.
No one knows for sure what truly happens in it, at least, here is what I beileve happened...
It starts out with a lost miner, as heard begging as he is quivering while he trys to mine/find his way out of where ever he 
just might happen to be.
You hear alot of strange noises as this goes on, you will also notice him as in sort of a panic mode so to speak.
You will then notice he attempts to take a break as heard he is not mining anymore, he then stops, you here something ruffling, like paper, shortly after maybe a second or 2, you here him trying to light a lighter, he is most likly just trying to read a book of some sort and tring to provide light, or maybe write his own, I don't know to be sure.
He starts to cough, the air is not the best in the mine , which explains why he is coughing. He continues to cough and you
hear the sound of pages ruffling again, almost like as if he was reading a book.
He decides to pack up and keep moving until a sudden noise coming from the tunnel he mined approaches.
As he goes to check, he looks in pure shock and terror as he looks at a tall black figure looking at him from A distance, it grins and starts walking aggresivily toward him.
He quickly got his pickaxe (Or what was left of it) and started mining. As he started it kept getting closer, until the figure knocked the voice recorder out of the Miners hand and thus fouth proceeding to rip his flesh and consume him.