@Override
  /**
   * Update images for poke & terror, and else.
   */
  public void update(Observable o, Object arg)
  {
    if (arg == GameEvent.POKE)
    {
      showPokeTimer.restart();
    }
    else if (arg == GameEvent.TERRIFY)
    {
      showTerrifyTimer.restart();
    }
    else if (arg == GameEvent.RESET || arg == GameEvent.LOAD || arg == GameEvent.MOVE)
    {
      showTerrifyTimer.stop();
      showPokeTimer.stop();
    }
    repaint();
  }