I am visiting a friend, an older man, avuncular, who runs an old-fashioned pharmacy. We are chatting about, among other things, the recent increase in the number of beggars and the difference between genuine street people and criminals, when two men enter the shop. Something in their eyes makes me nervous, but before I can act on this one of them has pulled a knife on my friend and the other has barred the exit. The door is glass but the street is deserted and nobody will see us. There is no panic button and I can't reach a phone. I am numb with horror and the same thought keeps repeating: "oh no, not again, not again"....