FWIW, I was assaulted by a man with brass knuckles. He didn't knock me out, and fought him off. I already had a broken nose, so he did not do much damage, but there was a fair amount of blood. I think he knew that I spoke English, and was in the disco by the river, so he waited until I walked on a dark, lonely path.
I would say that when there are no other people around, to never, ever let anyone get close enough to be able to take a shot at you, and just presume that someone walking on the same path is going to try to hit you.
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