I was recently at the edge of the Tenderloin, in Union Square, when out of nowhere when a man walked up behind me, drunk or high or crazy (or some combination o

I was recently at the edge of the Tenderloin, in Union Square, when out of nowhere when a man walked up behind me, drunk or high or crazy (or some combination of the above), hands covered in blood, and a trail of blood behind him. Before I even noticed him, he casually wiped his bloodied hands on my shoulder, and slurred some loud but incomprehensible statement at me. Not really sure how to react, I briskly walked away, and kept an eye on him doing much the same thing to other people as I did my best to simply keep my distance. Perhaps I should have called the cops, perhaps even an ambulance given the state of his hands, but in all honesty I just wanted to keep my distance and not get even more covered in blood, or assaulted in some even worse way. I'm not trying to make any particular point with this story, just adding my contribution of an event that happened in the area.