It stems from an old BBC documentary that used to have a dedicated website where you could watch it. The title escapes me, but no search terms describing it ever get results. I think it's been scrubbed. In it you can see time and again how people react to unusual orders when there is a uniformed "authority figure" present.
This sort of thing is done in the UK from time to time.
https://www.youtube.com/watch?v=4jcleVvgchs
It stems from an old BBC documentary that used to have a dedicated website where you could watch it. The title escapes me, but no search terms describing it ever get results. I think it's been scrubbed. In it you can see time and again how people react to unusual orders when there is a uniformed "authority figure" present.