the problem really ramps up if you are a concealed weapons licensee or plan on becoming one....

there are many CCW "diploma mills" rampant at gun shows and shooting ranges that show you a couple of films, and have you fire one shot to show competency (all that is required in the state of Florida)...

you really need to have an attorney, preferably a State's Attorney explain the liabilities and responsibilities if you act on behalf of others, let alone the perception of threat to yourself...

on a lesser thought, I've used a 10BC fire extinguisher on two separate occasions on vehicle fires of strangers, and neither offered to replace the extinguisher

a shooter friend (male ER nurse) injured his hand during a match, and I used about 1/2 roll of cling tape to immobilize the finger until he could get it x-rayed....he handed me a new roll the next match