Subway Chokehold - Daniel Penny VS Jordan Neely through the lense of Halacha / AI Paskening II

Overreacting in self defense, is it Muttar?Do you have have to try to be מציל באחד מאבריו when someone’s attacking you?When unsure if someone is attacking what can you do to protect youself?<br/>(ספק רודף)Self defense against people who are mentally unstable – does a שוטה have a din of a rodef?Are you חייב מיתה if you kill a שוטה?What preventive measures can you take to protect yourself from being harmed?