The River Baaaaaaaa!!!! ARRRGGGHHHH!!!!!               -      N      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

As you step further out toward the bank, you step onto a moss-covered
rock, and you slip and fall!  The wet ground and grass slides you right down
into the fast-moving river!  AAARRRGGGHHH!!!  
A sentient mist is hidden in the air here, waiting for prey.