You enter Phobos Hell, level 37. Khe, he, he, this will be a mess... As you enter, some weird alarm starts howling!
It's not on the wiki, and a quick search of the forums gives no results. o_o
I'm on HNTR Ao100.
I didn't notice anything odd. Maybe it was that all the barrels were lava? But given my depth, that's not weird.