It's hard to tell just how thick the walls are from his current position. The wall near the front door, though, was extremely dense - the door itself was nearly six inches of pure metal and it was covered entirely by concrete on either side when fully retracted. A foot of concrete, maybe?

Night 003
Hour 8: III.J.25

The mango refuse is left on the ground while Rust hikes his way onto the toilet. It takes a lot of stabbing and levering and cracking plastic away from screws, but eventually the panel over the lights comes off, revealing a strip of LED lights. They don't look obviously broken, but they definitely aren't turning on, either. It looks like they're fastened in place near the ends with screws, and there's something dark, like the head of a large nail, showing from underneath the opaque LED casing directly in the center.

Morning 004
Hour 1: III.J.25 (network contemplations)

While Rust is messing around on the network, he'll notice a drone - the one closest to the door - slowly rev up, lift off, and then exit the building. The damaged front door seems to struggle to open for it, but there's just enough room for the large robot to fit, and it's graceful as ever when navigating the gap.

Hour 2: III.J.25

Rust's knife works well enough as an impromptu screwdriver for the hex-head screw in the back of his transceiver. However, the first affirmative twist causes an inexplicable shock of pain through Rust's sternum. It's quick, but doesn't completely fade as long as the screw is left loose. Does he continue?

Rust has 6 hours remaining before Day 004.