"Nope tnt :D I didn't cut it all out in one sitting just gradually expanded it over time."

"Please tell me you used WorldCraft to cut that hole out."

"If you stare at them while they're stuck going around in the mine cart, does the game play Eyes on Me from FF8?"

"My top secret research lab hidden deep in the desert near 1.8 spawn. I use it to try things out before building them elsewhere or not bothering if the idea doesn't work. Here the enderman have been stealing gravel from my portculis prototype so it will no longer work but got trapped in the minecart I was using as a timer.."

"I hate those bastards.
One has to ask - where the hell is this?"

"YES!!!"

"First words that come to mind: "Aperture Laboratories""

"Did you say "URGH! MUM!""

"That's not an answer, you infuriating backstard!"

"the use of iron blocks and many lights allows it to blend seamlessly into the background"

"bit further on past the other thing"

"unfinished :D"

"No-one would see it. It's well hidden."

"If it is out by 1.8 spawn, then it's sitting on top of a sand plateau. Not very secret is it? ;-)"

"OMG, where on earth is this? By 1.8 spawn?"