An Underground River                                   -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      -      -

You are swept in an underground stream, originating from a glacier buried
deep underground.  As the icy water rushes past you, the freezing bite of
the water, chills you to the bone.  The thought of being frozen to death,
terrorizes your mind.  Small chunks of ice flow past you, rushing to an
unknown outlet.  An escape must come soon, else you surely will freeze to
death in the frigid water.  
A large stalactite is dislodged from the ceiling, narrowly missing you!