Pepper spray and stuff? Probs not applicable, but it made me think of this...
Back when, one of my high school friends went into the Army. He said that they had to go through this building/room thingy that had some kind(s) of gases in it as part of gas attack training. This guy said everybody got literally foot-long booger and snot ropes hanging from their sinuses from the action of the gas. My friend has horrible year-round allergies, and said that was the first time in years that he was truly able to breathe completely freely through the nose. Harsh treatment, but it worked.
His wife, not being inured to the life of a serviceman, was ready to sue the government (it was all I could do not to laugh, but I managed it because she is an awesome best friend) for abusive training methods. She ranted the same way when he went off to play war games with laser tag vests and threw himself down a hill in order not to get hit and dinged himself some. And when he didn't get his leave EXACTLY when told - that time, she tried to call her senator about it. Good thing he wasn't career - she would have mucked up every promotion, probably.
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC