The danger of beeing a postman

In a previous post I mentioned the stuff people hang on their doors, but I did not mention the dangers that are connected to said stuff. Today I experienced one of them when I completely innocently tried to shove a couple of letters down a box. I hit my head on a nail and blood came gushing out. I was lucky that the scar will be hidden beneath my full head of hair and not completely visible in my forehead.