A Very Long Fall...                                    -      -      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -      -

Stepping into this dark room was clearly a mistake.  The dust covered
floor was not nearly as sturdy as it should have been and following a sharp
cracking sound, you find yourself tumbling through space.  While cringing at
first, you slowly relax and begin to count the seconds as you continue to
tumble.  Hopefully the ground is very soft at the bottom of this long
fall...