Never mind tobacco smoke... firing weapons and being encased in clouds of gun smoke are the perfume of a battlefield. Causing larger than 1/72nd lifesive "boogers/bogies/snot" which delicately removed by a selected finger nail in a moments peace, when taking cover from enemy fire behind a barricade trench, helped reduces ones blood pressure.

Now able to breathe a deep breath and more oxygen into the bloodstream, its up, dash forward 10 yards and down....en avant mes braves.