[i]JT chuckled and got to work. Nanomachines came down from the heavens in a huge black cloud, swathing the sky in an amalgorithm of darknesses until it ended its quick approach. The swarm manifested at the very base of the cave entrance, and it soon grew into a black wall of nearly impenetrable metal with a hole in the middle. JT rolled up his sleeve and jokingly winked at Lizzie as he put his arm through it, though diverted his gaze soon enough as his hand folded back on the inside of the cave and six long, triangular strips came out of his wrist, forming an industrial drill. He made the drill wide enough to be larger than the hole and block it off, before it started up. The drill's heat was immense. The friction between the drill and the self repairing nanomachine wall with no ways out had made the cave's inside unbearably hot, enough to give any animal inside a heatstroke within minutes and kill them outright via dehydration from sweating within the hour. It was almost a melting pot for the wall, but JT kept the drill speed low enough to keep it from melting the drill's ceramic and the nanites. [/i]