in taking the photo, I am constantly being pushed to move forward:

are we too busy to take 1s off to do a long exposure?

if there is one thing photography teaches us, it's the appreciation of time duration:

sometimes, we need to slow it down, people being figures, and we see how a group of people is more than a mere collection of individuals, they show a single coherent theme

sometimes, we need to be quick, so that the flicker of the smile is retained...