I made a separate save file to mess around with INVedit. I'm simultaneously making a huge minecoaster and hollowing out islands with the power of TNT spam.

INVedit? Haven't heard of it, I think...

It was made by the creator of NBTedit, INVedit edits your inventory, and lets you also use normally unplaceable blocks. (Ex: Bedrock, sponges, leaves) And you can make you armor near-invincible.. Thus meaning you can go deep lava diving fr abut 30 mine (On my own time) Before you're DED.

Oh yeah and you can put fire into your inv, and make chainmail armor, seriously.

Nice.

Yeah.. Until you place bedrock to see if the game crashes, and it doesn't, but you realize you can't remove it. :I

... Awkward.