TMW you get legolas'd by a sneaky skeleton when you're trying to mine.
My favorite is when I'm trying to mine a normal looking wall in a cave, nothing else moving around, I remove the block directly in front of me, and **TWANG** , a quite loud arrow to the face from the skeleton that JUST HAPPENED to be standing on the other side of it. It could have been standing in any other freaking spot out of like a million spots. No, it stands behind that one freaking block. Because it's a jerk. I swear the game does this on purprose.
Freaking Minecraft has jumpscared me with that crap more than any horror game ever has.