Tumbling Down a Waterfall                              -      -      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

AIEE!  SPLASH!!  You just landed in a deep pool of water at the bottom of
a waterfall!  Once you manage to emerge from the depths of the pool, you
notice that you took quite a long fall.  You spot a small surface at the
edge of the pool to the east.  Perhaps you should swim over there and see
where exactly you are now.