answer:Quite often. The most recent one being about 4 or 5 days ago. I was walking to the next town over, when I hear someone yelling in the distance. It was some angry German who wanted me to stop, but I just kept walking as he shouted half incomprehensible things. As he got close to me he was getting angrier and pointing and shaking his fist, so I hit him before he had a chance to hit me. I then carried on walking to the next town over, wondering what the hell was wrong with him, I had never seen him before in my life.