Really free
people...
(1) CSOs gone shopping ???
(2) T.O. know train come, yet still SMSing
(3) T.O enjoying scenery???
(4) Chatting with friend? Job more important
pls

Top Left: They have a life too, they have already finished their
shift and are heading home.
Top Right: Who knows, that might be an emergency message?
Bottom Left: Waiting for train, enjoying scenery of course, then
what, catch you taking pictures of them ah?
Bottom Right: They have a life too, this is called social
interaction.