Anything is fair game.

This is what cracks me up about so-called tough guys who think their MMA/boxing skills means they can pick fights out in public. You can be world champion of whatever the fuck. It all goes out the window when someone pulls a knife or a gun. The best self defense is to not get into confrontations and to de-escalate. Especially when it involves countries with militaries.

Everybody thinks they got a plan until they get shot in the face.