This kind of emergency planning is too complicated. Nobody’s gonna remember what REACT stands for when the room is filled with toxic smoke. By the time you get to the wall to read this instruction card, if that is even possible under the conditions, either you will have successfuly removed occupants, enclosed area, and activated alarm or you will have not – and it’ll be too late to go back and try again.
Curiously, “code brown” has another meaning in the lore of medical residents.