As I was removing some dirt, I suddenly saw something that looked like x-ray of stuff underneath, which is farely normal, but it was actually a hole with nothing in it, except for monsters floathing up and down. I jumped in to it, and got caught. Inside I could "fly" around in the "hole" very very slowly, but when I got to the edge (the actual map), I couldn't get into it. I removed everything in my inventory into a chest, and found out that I could kill myself, by suffocation in a part of the hole (although there was notning there)..

It's not a bug I know how to trigger, it's just inside my map.

I've made a video of the thing, if you need further details please feel free to contact me.

http://www.youtube.com/watch?v=HK69AsLvXhg