@kali66 phone cameras, small mirrorless cameras, work great for this kind of shot, they do not intimidate or disturb the scene. I look at it as recording daily life! I don't post much of it on here, but I have a series of photos of life on public transport here in Chicago.
oh Andie - I love the contrast in the two sets of people - the lack of interest in the front pair is rather sad but then we don't know what sort of day they have had or what they are thinking about
It is an awesome shot ... and I love the commentary that goes with it.