Well....
So I made a cheat level and I found a mine. I started blasting away all the dirt/gravel with TNT and now I hear at least 5 zombies and 2 skeletons under me where there is dirt. I'm gonna see if I hit some cobblestone. :D
Well, I went somewhere and came back and dug down into stone.
Looool. 3 skeletons, 3 creepers, and 4 zombies. They killed each other off but a creeper, skeleton and zombie remain. =/
I'm not joking.
EDIT: Scratch that, I went into the hole to find 2 records and more creepers. =/
LOLOLOL TIME TO FIND DAT DUNGEON.
EDIT
2: They just keep on comming. :C
EDIT
3: Ok theres like 3 dungeons of each mob or these things just like to spawn in this cave. =/