The original chemical weapons. Effective without being fatal.
At one campground, the ranger warned us to stay calm and just let the skunks march through the campsite.
Sure enough, an hour after dark, here they came in a little line, just about brushing their tails against our shins as they paraded under our folding chairs by the fire.
We stayed calm. They stayed calm. It turned out okay, but maybe not if someone had sneezed.