moving staircase shots

i got to know this location by accident and immediately thought i have to take longexposures there. so when i went there it all went well until an elderly man walked down the station platform. he paced around for maybe 20 minutes and watched me. several trains he could have taken went by. and suddenly he came towards me and asked me if i had a permission to take photos of those people. i tried to explain him that i expose quite some time and so it's difficult to recognize a single person. but as he had no clue about photography he only asked for maybe 10 times if i had a permission. i tried to be polite but at some point i said no and that i don't care about him and his opinion and he should call the police or so. then he got kind of upset and said that if he will ever be on a pic i would really get into trouble. i told him that he did not came down the moving staircase so he is not on any of the pics. so he left. and about 15 minutes later security guys from the u-bahn came by and told me they got a call and i have to leave.

More photos by bloomchen