well, if they are close and they are able to run faster than you, you're fucked. running is the best option if you aren't strapped. if you have a holstered gun and they are within a couple of feet of you with knives in their hands, you're also fucked. best thing is to have common sense, street smarts and awareness in order to avoid getting in sticky situations in the first place. if you see a situation like picrel, just walk in another direction and let them sort out their shit within their culture, it's none of your business if these dudes all stab each other.
Germany