Capturing candid, unmediated chance encounters: That is what street photography is about. I think that is what is captured here. That, and an unusual perspective.
Sometimes to make a photo seem more interesting, it is worth trying to find an unusual perspective, to make the scale of different aspects seem different, unrealistic.
I took this on Ilford FP4, a 125iso black and white film. I like it how it is so forgiving, with a good dynamic range for this. It keeps the midtones open while still maintaining contrast but with detail in the shadows and highlights.