I was on my single player world, I had just got back from mining and I was smelting the ores I had and putting them in the correct chests (yes, I have different chests for different things, I just find it easier that way). I got some iron ingots out of my 'Precious Things' chest and looked in the chest for my building materials, looking for sticks. I then saw something in the corner of my screen and pressed 'e' to get out of the chest. There was what looked like a zombie head poking out of the floor and then a random explosion happened and blew up my house.

I'm not asking for an explanation or anything, I just wanted to share this weird and creepy story of what happened on one of my single player worlds.