Civil Defense
If you are sprayed with an unknown substance, stand and think about it instead of seeing a doctor.
Here is a funny take the Department of Homeland Security’s new civil defense signs. Slate has a good article on the history of civil defense, and how early Cold War enthusiasm/hysteria for bomb shelters and duck-and-cover drills fell into silly 1950s nostalgia. Post-Cold War, we can laugh at our or our parents’ credulity, both at the notion of caring about how our investments are doing after a full scale nuclear war, and at the notion that we can uncritically trust the government can be on national security.