Just how well do you know how your body works.
In 1985 a Battalion of the French Foreign Legion had been going though mock chemical attacks with a low flying aircraft that would drop a mist of water over the troops in preperment for an real chemical attack, after sometime of this drilling they then put in a red die in the aircraft and dropped the die over the troops. Believing that a horrible mistake had been made and the real chemicals compounds had been dropped over them even seasoned troops where shaken to the core with scores of soldiers writhed to the ground manifesting symptoms of an genuine chemical attack.
Cowboy up