The thing about street photography is that you not only need to be fast, but you need to set your shots up as you are walking towards your subjects. I’ve often referenced to friends in conversation that when I’m walking around that I don’t really see moving images. My eyes see everything as sets of still images. I look, take the scene in and in the case of this photo - drop to one knee, click, and then keep walking.
Shot in DUMBO, New York City with a Canon EOS 5D Mark III and a EF 50mm f/1.2L.