Well at least Luka didn't spit into their hand. They don't withdraw the offered hand, just standing and waiting. They keep breathing, though, making the area around them colder with each passing moment.

Luka's efforts on the door pay off, though, because he'll find a section that's textured oddly. From any outside observer, the set of buttons are practically invisible to the naked eye. It's only on closer inspection that the 3 by 4 grid of buttons with engraved numbers becomes obvious. It's only clear to Luka what he's found because he has his fingers on it. The buttons are nearly flush with the smooth stone, seemingly a part of whatever this is.

Wack.