Rolling Log                                            NW     -      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -     SE

You have trouble moving your way out of the log, going backward, wiggling
with the log rolling down the side of a hill makes your movement next to
impossible.  The log leaves the ground a second time and cracks as it
returns back to earth, your body takes a beating with each thump and rock
that comes along.  SLAM!!  The log bursts into a splintery mess as it hits a
tree and expoldes outward.