Without thinking, I turned from the main, busy street into a side alley. I was running late to see a friend, and Google Maps showed this route through dark, pot-holed Athens back streets to be the fastest way to get to my destination. I hurried along, frowning down at the map on my phone screen whilst music blared through my headphones. I don’t know when I became aware of his presence. But I remember feeling my stomach drop. You are not safe said my body to my mind.