Lab/Ant Tunnel

[size=8pt]So I went to a lab and used the stairs to go down to the second level. The thing is, when I used > it brought up a prompt informing that is was a sheer drop. I selected yes anyway and ended up in an empty ant tunnel with no apparent exit (yet). I am just curious as to if this is a feature of the game or possible bug, hence why I posted about it here. Has anyone else experienced this?[/size]

At least I had lost one character when I sank into some kind of caverns without exit in my travel through the swamp.

It’s a feature, a cruel one, but part of Cataclysm, and roguelikes in general. I suggest getting some rope if you intend to play with our weird z-levels