An Ashy Cliff                                          -      -      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

You are on the brink of an ashy cliff.  You cringe with fear as you look
down and see molten rock flowing through a tunnel so small the very thought
of being in it makes you shudder.  On the edge of the cliff the rock floor
is thin and it is easy for one to break the rock and fall.  You look to the
opposite wall and see another cliff, similar to this one while crossing the
lava down below is a thin road that leads to another tunnel.  As you stand
here contemplating where it might lead you notice the rock you're standing
on feels unstable.