Fire fighting method and apparatus deployed after flame collapse for extinguishing "smiley face"

A method for extinguishing industrial tank fires of flammable/combustible liquid, comprising;

• achieving flame collapse, the achieving including applying foam over a tank wall with one or more primary nozzles staged at a six o'clock position;
• and
• subsequent to flame collapse, achieving collapse of a “smiley face”, the achieving collapse of the “smiley face” including applying foam over a tank wall to the “smiley face” using at least one react line and nozzle staged at least at an eight o'clock or further away position, or four o'clock or further away position, around the tank from the six o'clock position.