EXIT-TRIGGER

EXIT:
  Triggered when the actor exists the room with owner in it.  The owner must
  be able to see the actor, and cannot be fighting, or be in a position different
  from default_position set in OLC.  Phrase is the direction that will cause the
  trigger (up, down, east, west, north, south)
  NOTE:
    All morp have ability to use "stop <target>" command, that will cause the
    target player/mob to abort exit in that direction.  Useful for blocking
    certain rooms, and exists unless specific conditions are met.
    Example:  
      room stop $n
  END NOTE
Example:
add 300 exit down