Okay i think it's that silver fish thing but i got the new too many items mod for the pre release 1.8 and i test this block that looks like stone. So i break it and this friken thing jumps out of it and start following me! It's like a REALY freaky tiny slime. Doesn't hurt me but pushes me around and sounds like a spider. I havn't tried making it eat wood yet but it scared the friken hell out of me!

If there are any other messed up mobs that randomly pop up...plz tell me because you have no idea how scared i was when this thing popped outof this stone...