I sort of have this sense of danger and when something bad is about to happen I usual get really tense and want to get out of there. The first time I played that pre-alpha version of Minecraft weird things started to happen and I got so scared I had to start a new world. This is the story :
So I had been in the world for about a half an hour and I had established a cave house and I had made a ram-sheep because I was lonely and they're wasn't actual animals around. I turned around to look at Tod the sheep when I saw something dart from behind his leg to behind a cliff. I ignored it the best I could and went into the cave house. I put up a fake wool bed in the floor to make it seem a little more realistic and looked out the window at the tree and saw the same thing dart away from the tree. After I ended up flooding my cave and thought I had to put sand everywhere to get rid of it I step back to the rim of the lake that had flooded it. I looked to the otherside of it to see a tree with half its leaves gone . I left for a new world after that.
I still don't know what happened.