What happened to the trench coat? Did he take the time to take off his coat before he started beating you? Are those reflections off of glass in the picture? Wasn't it 8:30 am at the time of the beating? Why is the background dark? Why did you need a flash to take the picture if it was daylight? If someone showed me this picture and asked me what I saw I would say that it looks like a picture of a man standing behind a piece of plate glass, what he is doing I couldn't even hazard a guess. If not for the descrepancies between the picture and your story I would believe that it could have happened. Otherwise it is an interesting piece of fiction. There must have been alot of cameras at the demo, do you have any other pictures of this event?